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1. Measurement of substructure-dependent jet suppression in Pb+Pb collisions at 5.02 TeV with the ATLAS detector

Author: Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, ATLAS Collaboration, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, and ATLAS Collaboration
Abstract: The ATLAS detector at the Large Hadron Collider has been used to measure jet substructure modification and suppression in Pb+Pb collisions at a nucleon–nucleon center-of-mass energy s = 5.02 TeV in comparison with proton–proton (pp) collisions at √s = 5.02 TeV. The Pb+Pb data, collected in 2018, have an integrated luminosity of 1.72 nb, while the ppdata, collected in 2017, have an integrated luminosity of 260 pb. Jets used in this analysis are clustered using the anti-k algorithm with a radius parameter R = 0.4. The jet constituents, defined by both tracking and calorimeter information, are used to determine the angular scale r of the first hard splitting inside the jet by reclustering them using the Cambridge–Aachen algorithm and employing the soft-drop grooming technique. The nuclear modification factor, R, used to characterize jet suppression in Pb+Pb collisions, is presented differentially in r, jet transverse momentum, and in intervals of collision centrality. The R value is observed to depend significantly on jet r. Jets produced with the largest measured r are found to be twice as suppressed as those with the smallest r in central Pb+Pb collisions. The R values do not exhibit a strong variation with jet p in any of the r intervals. The r and p dependence of jet R is qualitatively consistent with a picture of jet quenching arising from coherence and provides the most direct evidence in support of this approach.
Published: 2023

2. Search for a light charged Higgs boson in t -> H±b decays, with H± -> cb, in the lepton plus jets final state in proton-proton collisions at root s=13 TeV with the ATLAS detector

Author: Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Estrada, Oscar, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Mamuzic, Judita, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, L, Moreno Llácer, María, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Villaplana Pérez, Miguel, Vos, Marcel, ATLAS Collaboration, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Estrada, Oscar, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Mamuzic, Judita, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, L, Moreno Llácer, María, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Villaplana Pérez, Miguel, Vos, Marcel, and ATLAS Collaboration
Abstract: A search for a charged Higgs boson, H-+/-, produced in top-quark decays, t -> H(+/-)b, is presented. The search targets H-+/- decays into a bottom and a charm quark, H-+/- -> cb. The analysis focuses on a selection enriched in top-quark pair production, where one top quark decays into a leptonically decaying W boson and a bottom quark, and the other top quark decays into a charged Higgs boson and a bottom quark. This topology leads to a lepton-plus-jets final state, characterised by an isolated electron or muon and at least four jets. The search exploits the high multiplicity of jets containing b-hadrons, and deploys a neural network classifier that uses the kinematic differences between the signal and the background. The search uses a dataset of proton-proton collisions collected at a centre-of-mass energy root s = 13TeV between 2015 and 2018 with the ATLAS detector at CERN's Large Hadron Collider, amounting to an integrated luminosity of 139 fb(-1). Observed (expected) 95% confidence-level upper limits between 0.15% (0.09%) and 0.42% (0.25%) are derived for the product of branching fractions B( t -> H-+/- b) x B( H +/- -> cb) for charged Higgs boson masses between 60 and 160 GeV, assuming the SM production of the top-quark pairs.
Published: 2023

3. Search for resonant WZ production in the fully leptonic final state in proton–proton collisions at √s=13 TeV with the ATLAS detector

Author: Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, ATLAS Collaboration, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, and ATLAS Collaboration
Abstract: A search for a WZ resonance, in the fully leptonic final state (electrons or muons), is performed using 139 fb of data collected at a centre-of-mass energy of 13 TeV by the ATLAS detector at the Large Hadron Collider. The results are interpreted in terms of a singly charged Higgs boson of the Georgi–Machacek model, produced by WZ fusion, and of a Heavy Vector Triplet, with the resonance produced by WZ fusion or the Drell–Yan process. No significant excess over the Standard Model prediction is observed and limits are set on the production cross-section times branching ratio as a function of the resonance mass for these processes.
Published: 2023

4. Search for heavy Majorana or Dirac neutrinos and right-handed W gauge bosons in final states with charged leptons and jets in pp collisions at root s=13 TeV with the ATLAS detector

Author: Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72], Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Bouchhar, Naseem, Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Chitishvili, Mariam, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Lacasta Llácer, Carlos, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valiente Moreno, Enrique, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, ATLAS Collaboration, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72], Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Bouchhar, Naseem, Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Chitishvili, Mariam, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Lacasta Llácer, Carlos, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valiente Moreno, Enrique, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, and ATLAS Collaboration
Abstract: A search for heavy right-handed Majorana or Dirac neutrinos N-R and heavy right-handed gauge bosons W-R is performed in events with energetic electrons or muons, with the same or opposite electric charge, and energetic jets. The search is carried out separately for topologies of clearly separated final-state products (resolved channel) and topologies with boosted final states with hadronic and/or leptonic products partially overlapping and reconstructed as a large-radius jet (boosted channel). The events are selected from pp collision data at the LHC with an integrated luminosity of 139 fb(-1) collected by the ATLAS detector at root s = 13 TeV. No significant deviations from the Standard Model predictions are observed. The results are interpreted within the theoretical framework of a left-right symmetric model, and lower limits are set on masses in the heavy right-handed W-R boson and N-R plane. The excluded region extends to about m(W-R) = 6.4 TeV for both Majorana and Dirac N-R neutrinos at m(N-R) < 1 TeV. N-R with masses of less than 3.5 (3.6) TeV are excluded in the electron (muon) channel at m(W-R) = 4.8 TeV for the Majorana neutrinos, and limits of m(N-R) up to 3.6 TeV for m(W-R) = 5.2 (5.0) TeV in the electron (muon) channel are set for the Dirac neutrinos. These constitute the most stringent exclusion limits to date for the model considered.
Published: 2023

5. Performance of the reconstruction of large impact parameter tracks in the inner detector of ATLAS

Author: Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72], Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Bouchhar, Naseem, Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Lacasta Llácer, Carlos, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valiente Moreno, Enrique, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, ATLAS Collaboration, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72], Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Bouchhar, Naseem, Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Lacasta Llácer, Carlos, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valiente Moreno, Enrique, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, and ATLAS Collaboration
Abstract: Searches for long-lived particles (LLPs) are among the most promising avenues for discovering physics beyond the Standard Model at the Large Hadron Collider (LHC). However, displaced signatures are notoriously difficult to identify due to their ability to evade standard object reconstruction strategies. In particular, the ATLAS track reconstruction applies strict pointing requirements which limit sensitivity to charged particles originating far from the primary interaction point. To recover efficiency for LLPs decaying within the tracking detector volume, the ATLAS Collaboration employs a dedicated large-radius tracking (LRT) passwith loosened pointing requirements. During Run 2 of the LHC, the LRT implementation produced many incorrectly reconstructed tracks and was therefore only deployed in small subsets of events. In preparation for LHC Run 3, ATLAS has significantly improved both standard and large-radius track reconstruction performance, allowing for LRT to run in all events. This development greatly expands the potential phase-space of LLP searches and streamlines LLP analysis workflows. This paper will highlight the above achievement and report on the readiness of the ATLAS detector for track-based LLP searches in Run 3.
Published: 2023

6. Correlations between flow and transverse momentum in Xe + Xe and Pb + Pb collisions at the LHC with the ATLAS detector: A probe of the heavy-ion initial state and nuclear deformation

Author: European Commission, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, ATLAS Collaboration, European Commission, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, and ATLAS Collaboration
Abstract: The correlations between flow harmonics v for n = 2, 3, and 4 and mean transverse momentum [p] in Xe + Xe and Pb + Pb collisions at s = 5.44 and 5.02 TeV, respectively, are measured using charged particles with the ATLAS detector. The correlations are potentially sensitive to the shape and size of the initial geometry, nuclear deformation, and initial momentum anisotropy. The effects from nonflow and centrality fluctuations are minimized, respectively, via a subevent cumulant method and an event-activity selection based on particle production at very forward rapidity. The v-[p] correlations show strong dependencies on centrality, harmonic number n, p, and pseudorapidity range. Current models qualitatively describe the overall centrality- and system-dependent trends but fail to quantitatively reproduce all features of the data. In central collisions, where models generally show good agreement, the v-[p] correlations are sensitive to the triaxiality of the quadruple deformation. Comparison of the model with the Pb + Pb and Xe + Xe data confirms that the Xe nucleus is a highly deformed triaxial ellipsoid that has neither a prolate nor oblate shape. This provides strong evidence for a triaxial deformation of the Xe nucleus from high-energy heavy-ion collisions.
Published: 2023

7. Measurements of W+W- production in decay topologies inspired by searches for electroweak supersymmetry

Author: Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72], Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, ATLAS Collaboration, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72], Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, and ATLAS Collaboration
Abstract: This paper presents a measurement of fiducial and differential cross-sections for WW production in proton–proton collisions at s=13 TeV with the ATLAS experiment at the Large Hadron Collider using a dataset corresponding to an integrated luminosity of 139 fb . Events with exactly one electron, one muon and no hadronic jets are studied. The fiducial region in which the measurements are performed is inspired by searches for the electroweak production of supersymmetric charginos decaying to two-lepton final states. The selected events have moderate values of missing transverse momentum and the ‘stransverse mass’ variable m , which is widely used in searches for supersymmetry at the LHC. The ranges of these variables are chosen so that the acceptance is enhanced for direct WW production and suppressed for production via top quarks, which is treated as a background. The fiducial cross-section and particle-level differential cross-sections for six variables are measured and compared with two theoretical SM predictions from perturbative QCD calculations.
Published: 2023

8. Constraints on spin-0 dark matter mediators and invisible Higgs decays using ATLAS 13 TeV pp collision data with two top quarks and missing transverse momentum in the final state

Author: Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), https://ror.org/02gfc7t72, Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, ATLAS Collaboration, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), https://ror.org/02gfc7t72, Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, and ATLAS Collaboration
Abstract: This paper presents a statistical combination of searches targeting final states with two top quarks and invisible particles, characterised by the presence of zero, one or two leptons, at least one jet originating from a b-quark and missing transverse momentum. The analyses are searches for phenomena beyond the Standard Model consistent with the direct production of dark matter in pp collisions at the LHC, using 139 fb of data collected with the ATLAS detector at a centre-of-mass energy of 13 TeV. The results are interpreted in terms of simplified dark matter models with a spin-0 scalar or pseudoscalar mediator particle. In addition, the results are interpreted in terms of upper limits on the Higgs boson invisible branching ratio, where the Higgs boson is produced according to the Standard Model in association with a pair of top quarks. For scalar (pseudoscalar) dark matter models, with all couplings set to unity, the statistical combination extends the mass range excluded by the best of the individual channels by 50 (25) GeV, excluding mediator masses up to 370 GeV. In addition, the statistical combination improves the expected coupling exclusion reach by 14% (
Published: 2023

9. Measurements of differential cross sections of Higgs boson production through gluon fusion in the H? WW*? e?µ? final state at √s=13 TeV with the ATLAS detector

Author: Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72], Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Bouchhar, Naseem, Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Chitishvili, Mariam, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Lacasta Llácer, Carlos, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, M., Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, ATLAS Collaboration, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72], Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Bouchhar, Naseem, Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Chitishvili, Mariam, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Lacasta Llácer, Carlos, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, M., Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, and ATLAS Collaboration
Abstract: Higgs boson production via gluon–gluon fusion is measured in the WW? e?µ? decay channel. The dataset utilized corresponds to an integrated luminosity of 139 fb collected by the ATLAS detector from s=13 TeV proton–proton collisions delivered by the Large Hadron Collider between 2015 and 2018. Differential cross sections are measured in a fiducial phase space restricted to the production of at most one additional jet. The results are consistent with Standard Model expectations, derived using different Monte Carlo generators.
Published: 2023

10. Measurement of the Higgs boson mass in the H → ZZ⁎ → 4ℓ decay channel using 139 fb−1 of s=13 TeV pp collisions recorded by the ATLAS detector at the LHC

Author: Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), https://ror.org/02gfc7t72, Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Bouchhar, Naseem, Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Chitishvili, Mariam, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, ATLAS Collaboration, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), https://ror.org/02gfc7t72, Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Bouchhar, Naseem, Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Chitishvili, Mariam, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, and ATLAS Collaboration
Abstract: The mass of the Higgs boson is measured in the H→ZZ→4ℓ decay channel. The analysis uses proton–proton collision data from the Large Hadron Collider at a centre-of-mass energy of 13 TeV recorded by the ATLAS detector between 2015 and 2018, corresponding to an integrated luminosity of 139 fb. The measured value of the Higgs boson mass is 124.99±0.18(stat.)±0.04(syst.) GeV. In final states with muons, this measurement benefits from an improved momentum-scale calibration relative to that adopted in previous publications. The measurement also employs an analytic model that takes into account the invariant-mass resolution of the four-lepton system on a per-event basis and the output of a deep neural network discriminating signal from background events. This measurement is combined with the corresponding measurement using 7 and 8 TeV pp collision data, resulting in a Higgs boson mass of 124.94±0.17(stat.)±0.03(syst.) GeV.
Published: 2023

11. Measurement of the nuclear modification factor of b-jets in 5.02 TeV Pb+Pb collisions with the ATLAS detector

Author: Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, ATLAS Collaboration, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, and ATLAS Collaboration
Abstract: This paper presents a measurement of b-jet production in Pb+Pb and pp collisions at sNN=5.02 TeV with the ATLAS detector at the LHC. The measurement uses 260 pb of pp collisions collected in 2017 and 1.4 nb of Pb+Pb collisions collected in 2018. In both collision systems, jets are reconstructed via the anti- k algorithm. The b-jets are identified from a sample of jets containing muons from the semileptonic decay of b-quarks using template fits of the muon momentum relative to the jet axis. In pp collisions, b-jets are reconstructed for radius parameters R= 0.2 and R= 0.4 , and only R= 0.2 jets are used in Pb+Pb collisions. For comparison, inclusive R= 0.2 jets are also measured using 1.7 nb of Pb+Pb collisions collected in 2018 and the same pp collision data as the b-jet measurement. The nuclear modification factor, R , is calculated for both b-jets and inclusive jets with R= 0.2 over the transverse momentum range of 80–290 GeV. The nuclear modification factor for b-jets decreases from peripheral to central collisions. The ratio of the b-jet R to inclusive jet R is also presented and suggests that the R for b-jets is larger than that for inclusive jets in central Pb+Pb collisions. The measurements are compared with theoretical calculations and suggest a role for mass and colour-charge effects in partonic energy loss in heavy-ion collisions.
Published: 2023

12. Luminosity determination in pp collisions at √s=13 TeV using the ATLAS detector at the LHC

Author: Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), https://ror.org/02gfc7t72, Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Bouchhar, Naseem, Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Chitishvili, Mariam, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Lacasta Llácer, Carlos, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valiente Moreno, Enrique, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, ATLAS Collaboration, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), https://ror.org/02gfc7t72, Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Bouchhar, Naseem, Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Chitishvili, Mariam, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Lacasta Llácer, Carlos, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valiente Moreno, Enrique, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, and ATLAS Collaboration
Abstract: The luminosity determination for the ATLAS detector at the LHC during Run 2 is presented, with pp collisions at a centre-of-mass energy s=13 TeV. The absolute luminosity scale is determined using van der Meer beam separation scans during dedicated running periods in each year, and extrapolated to the physics data-taking regime using complementary measurements from several luminosity-sensitive detectors. The total uncertainties in the integrated luminosity for each individual year of data-taking range from 0.9% to 1.1%, and are partially correlated between years. After standard data-quality selections, the full Run 2 pp data sample corresponds to an integrated luminosity of 140.1 ± 1.2 fb , i.e. an uncertainty of 0.83%. A dedicated sample of low-pileup data recorded in 2017–2018 for precision Standard Model physics measurements is analysed separately, and has an integrated luminosity of 338.1 ± 3.1 pb .
Published: 2023

13. Observation of gauge boson joint-polarisation states in W±Z production from pp collisions at s=13 TeV with the ATLAS detector

Author: Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), https://ror.org/02gfc7t72, Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Bouchhar, Naseem, Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Chitishvili, Mariam, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, ATLAS Collaboration, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), https://ror.org/02gfc7t72, Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Bouchhar, Naseem, Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Chitishvili, Mariam, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, and ATLAS Collaboration
Abstract: Measurements of joint-polarisation states of W and Z gauge bosons in WZ production are presented. The data set used corresponds to an integrated luminosity of 139 fb of proton–proton collisions at a centre-of-mass energy of 13 TeV recorded by the ATLAS detector at the CERN Large Hadron Collider. The WZ candidate events are reconstructed using leptonic decay modes of the gauge bosons into electrons and muons. The simultaneous pair-production of longitudinally polarised vector bosons is measured for the first time with a significance of 7.1 standard deviations. The measured joint helicity fractions integrated over the fiducial region are f=0.067±0.010, f=0.110±0.029, f=0.179±0.023 and f=0.644±0.032, in agreement with the next-to-leading-order Standard Model predictions. Individual helicity fractions of the W and Z bosons are also measured and found to be consistent with joint helicity fractions within the expected amounts of correlation. Both the joint and individual helicity fractions are also measured separately in WZ and WZ events. Inclusive and differential cross sections for several kinematic observables sensitive to polarisation are presented.
Published: 2023

14. Strong Constraints on Jet Quenching in Centrality-Dependent p+Pb Collisions at 5.02 TeV from ATLAS

Author: European Commission, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, ATLAS Collaboration, European Commission, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, and ATLAS Collaboration
Abstract: Jet quenching is the process of color-charged partons losing energy via interactions with quark-gluon plasma droplets created in heavy-ion collisions. The collective expansion of such droplets is well described by viscous hydrodynamics. Similar evidence of collectivity is consistently observed in smaller collision systems, including p p and p + Pb collisions. In contrast, while jet quenching is observed in Pb + Pb collisions, no evidence has been found in these small systems to date, raising fundamental questions about the nature of the system created in these collisions. The ATLAS experiment at the Large Hadron Collider has measured the yield of charged hadrons correlated with reconstructed jets in 0.36 nb - 1 of p + Pb and 3.6 pb - 1 of p p collisions at 5.02 TeV. The yields of charged hadrons with p T ch > 0.5 GeV near and opposite in azimuth to jets with p T jet > 30 or 60 GeV, and the ratios of these yields between p + Pb and p p collisions, I p Pb , are reported. The collision centrality of p + Pb events is categorized by the energy deposited by forward neutrons from the struck nucleus. The I p Pb values are consistent with unity within a few percent for hadrons with p T ch > 4 GeV at all centralities. These data provide new, strong constraints that preclude almost any parton energy loss in central p + Pb collisions.
Published: 2023

15. Measurement of the charge asymmetry in top-quark pair production in association with a photon with the ATLAS experiment

Author: European Commission, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Bouchhar, Naseem, Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Chitishvili, Mariam, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, ATLAS Collaboration, European Commission, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Bouchhar, Naseem, Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Chitishvili, Mariam, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, and ATLAS Collaboration
Abstract: A measurement of the charge asymmetry in top-quark pair (tt¯) production in association with a photon is presented. The measurement is performed in the single-lepton tt¯ decay channel using proton–proton collision data collected with the ATLAS detector at the Large Hadron Collider at CERN at a centre-of-mass-energy of 13 TeV during the years 2015–2018, corresponding to an integrated luminosity of 139 fb. The charge asymmetry is obtained from the distribution of the difference of the absolute rapidities of the top quark and antiquark using a profile likelihood unfolding approach. It is measured to be A=−0.003±0.029 in agreement with the Standard Model expectation.
Published: 2023

16. Observation of Single-Top-Quark Production in Association with a Photon Using the ATLAS Detector

Author: European Commission, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, ATLAS Collaboration, European Commission, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, and ATLAS Collaboration
Abstract: This Letter reports the observation of single top quarks produced together with a photon, which directly probes the electroweak coupling of the top quark. The analysis uses 139 fb^{-1} of 13 TeV proton-proton collision data collected with the ATLAS detector at the Large Hadron Collider. Requiring a photon with transverse momentum larger than 20 GeV and within the detector acceptance, the fiducial cross section is measured to be 688±23(stat) _{-71}^{+75}(syst) fb, to be compared with the standard model prediction of 515_{-42}^{+36} fb at next-to-leading order in QCD.
Published: 2023

17. Combined Measurement of the Higgs Boson Mass from the Formula Presented and Formula Presented Decay Channels with the ATLAS Detector Using Formula Presented, 8, and 13 TeV Formula Presented Collision Data

Author: European Commission, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Aikot, Arya, Amos, K.R., Aparisi, Pozo, Bailey, A.J., Bouchhar, Naseem, Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Chitishvili, Mariam, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R, Lacasta Llácer, Carlos, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, L, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valiente Moreno, Enrique, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, ATLAS Collaboration, European Commission, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Aikot, Arya, Amos, K.R., Aparisi, Pozo, Bailey, A.J., Bouchhar, Naseem, Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Chitishvili, Mariam, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R, Lacasta Llácer, Carlos, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, L, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valiente Moreno, Enrique, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, and ATLAS Collaboration
Abstract: A measurement of the mass of the Higgs boson combining the Formula Presented and Formula Presented decay channels is presented. The result is based on Formula Presented of proton-proton collision data collected by the ATLAS detector during LHC run 2 at a center-of-mass energy of 13 TeV combined with the run 1 ATLAS mass measurement, performed at center-of-mass energies of 7 and 8 TeV, yielding a Higgs boson mass of Formula Presented. This corresponds to a 0.09% precision achieved on this fundamental parameter of the Standard Model of particle physics.
Published: 2023

18. Measurement of the Sensitivity of Two-Particle Correlations in pp Collisions to the Presence of Hard Scatterings

Author: European Commission, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Bouchhar, Naseem, Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Chitishvili, Mariam, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Lacasta Llácer, Carlos, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valiente Moreno, Enrique, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, ATLAS Collaboration, European Commission, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Bouchhar, Naseem, Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Chitishvili, Mariam, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Lacasta Llácer, Carlos, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valiente Moreno, Enrique, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, and ATLAS Collaboration
Abstract: A key open question in the study of multiparticle production in high-energy pp collisions is the relationship between the "ridge"-i.e., the observed azimuthal correlations between particles in the underlying event that extend over all rapidities-and hard or semihard scattering processes. In particular, it is not known whether jets or their soft fragments are correlated with particles in the underlying event. To address this question, two-particle correlations are measured in pp collisions at sqrt[s]=13 TeV using data collected by the ATLAS experiment at the LHC, with an integrated luminosity of 15.8 pb^{-1}, in two different configurations. In the first case, charged particles associated with jets are excluded from the correlation analysis, while in the second case, correlations are measured between particles within jets and charged particles from the underlying event. Second-order flow coefficients, v_{2}, are presented as a function of event multiplicity and transverse momentum. These measurements show that excluding particles associated with jets does not affect the measured correlations. Moreover, particles associated with jets do not exhibit any significant azimuthal correlations with the underlying event, ruling out hard processes contributing to the ridge.
Published: 2023

19. Measurement of Suppression of Large-Radius Jets and Its Dependence on Substructure in Pb+Pb Collisions at Formula Presented with the ATLAS Detector

Author: European Commission, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Bouchhar, Naseem, Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Chitishvili, Mariam, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Lacasta Llácer, Carlos, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valiente Moreno, Enrique, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, ATLAS Collaboration, European Commission, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Bouchhar, Naseem, Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Chitishvili, Mariam, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Lacasta Llácer, Carlos, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valiente Moreno, Enrique, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, and ATLAS Collaboration
Abstract: This letter presents a measurement of the nuclear modification factor of large-radius jets in Formula Presented Formula Presented collisions by the ATLAS experiment. The measurement is performed using Formula Presented and Formula Presented of Formula Presented and Formula Presented data, respectively. The large-radius jets are reconstructed with the anti-Formula Presented algorithm using a radius parameter of Formula Presented, by reclustering anti-Formula Presented Formula Presented jets, and are measured over the transverse momentum (Formula Presented) kinematic range of Formula Presented and absolute pseudorapidity Formula Presented. The large-radius jet constituents are further reclustered using the Formula Presented algorithm in order to obtain the splitting parameters, Formula Presented and Formula Presented, which characterize the transverse momentum scale and angular separation for the hardest splitting in the jet, respectively. The nuclear modification factor, Formula Presented, obtained by comparing the Formula Presented jet yields to those in Formula Presented collisions, is measured as a function of jet transverse momentum (Formula Presented) and Formula Presented or Formula Presented. A significant difference in the quenching of large-radius jets having single subjet and those with more complex substructure is observed. Systematic comparison of jet suppression in terms of Formula Presented for different jet definitions is also provided. Presented results support the hypothesis that jets with hard internal splittings lose more energy through quenching and provide a new perspective for understanding the role of jet structure in jet suppression.
Published: 2023

20. Measurements of observables sensitive to colour reconnection in tt¯ events with the ATLAS detector at √s= 13 TeV

Author: Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72], Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Bouchhar, Naseem, Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, L, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, ATLAS Collaboration, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72], Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Bouchhar, Naseem, Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, L, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, and ATLAS Collaboration
Abstract: A measurement of observables sensitive to effects of colour reconnection in top-quark pair-production events is presented using 139 fb of 13 TeV proton–proton collision data collected by the ATLAS detector at the LHC. Events are selected by requiring exactly one isolated electron and one isolated muon with opposite charge and two or three jets, where exactly two jets are required to be b-tagged. For the selected events, measurements are presented for the charged-particle multiplicity, the scalar sum of the transverse momenta of the charged particles, and the same scalar sum in bins of charged-particle multiplicity. These observables are unfolded to the stable-particle level, thereby correcting for migration effects due to finite detector resolution, acceptance and efficiency effects. The particle-level measurements are compared with different colour reconnection models in Monte Carlo generators. These measurements disfavour some of the colour reconnection models and provide inputs to future optimisation of the parameters in Monte Carlo generators.
Published: 2023

21. New techniques for jet calibration with the ATLAS detector

Author: Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72], Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Bouchhar, Naseem, Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Chitishvili, Mariam, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Lacasta Llácer, Carlos, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valiente Moreno, Enrique, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, ATLAS Collaboration, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72], Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Bouchhar, Naseem, Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Chitishvili, Mariam, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Lacasta Llácer, Carlos, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valiente Moreno, Enrique, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, and ATLAS Collaboration
Abstract: A determination of the jet energy scale is presented using proton-proton collision data with a centre-of-mass energy of root s = 13 TeV, corresponding to an integrated luminosity of 140 fb(-1) collected using the ATLAS detector at the LHC. Jets are reconstructed using the ATLAS particle-flow method that combines charged-particle tracks and topo-clusters formed from energy deposits in the calorimeter cells. The anti-kt jet algorithm with radius parameter R = 0.4 is used to define the jet. Novel jet energy scale calibration strategies developed for the LHC Run 2 are reported that lay the foundation for the jet calibration in Run 3. Jets are calibrated with a series of simulation-based corrections, including state-of-the-art techniques in jet calibration such as machine learning methods and novel in situ calibrations to achieve better performance than the baseline calibration derived using up to 81 fb(-1) of Run 2 data. The performance of these new techniques is then examined in the in situ measurements by exploiting the transverse momentum balance between a jet and a reference object. The b-quark jet energy scale using particle flow jets is measured for the first time with around 1% precision using gamma+jet events.
Published: 2023

22. A search for heavy Higgs bosons decaying into vector bosons in same-sign two-lepton final states in pp collisions at √s = 13 TeV with the ATLAS detector

Author: European Commission, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Chitishvili, Mariam, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, ATLAS Collaboration, European Commission, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Chitishvili, Mariam, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, and ATLAS Collaboration
Abstract: A search for heavy Higgs bosons produced in association with a vector boson and decaying into a pair of vector bosons is performed in final states with two leptons (electrons or muons) of the same electric charge, missing transverse momentum and jets. A data sample of proton–proton collisions at a centre-of-mass energy of 13 TeV recorded with the ATLAS detector at the Large Hadron Collider between 2015 and 2018 is used. The data correspond to a total integrated luminosity of 139 fb. The observed data are in agreement with Standard Model background expectations. The results are interpreted using higher-dimensional operators in an effective field theory. Upper limits on the production cross-section are calculated at 95% confidence level as a function of the heavy Higgs boson’s mass and coupling strengths to vector bosons. Limits are set in the Higgs boson mass range from 300 to 1500 GeV, and depend on the assumed couplings. The highest excluded mass for a heavy Higgs boson with the coupling combinations explored is 900 GeV. Limits on coupling strengths are also provided. [Figure not available: see fulltext.]
Published: 2023

23. Search for heavy Higgs bosons with flavour-violating couplings in multi-lepton plus b-jets final states in pp collisions at 13 TeV with the ATLAS detector

Author: Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Bouchhar, Naseem, Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Chitishvili, Mariam, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Lacasta Llácer, Carlos, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valiente Moreno, Enrique, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, ATLAS Collaboration, Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Bouchhar, Naseem, Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Chitishvili, Mariam, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Lacasta Llácer, Carlos, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valiente Moreno, Enrique, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, and ATLAS Collaboration
Abstract: A search for new heavy scalars with flavour-violating decays in final states with multiple leptons and b-tagged jets is presented. The results are interpreted in terms of a general two-Higgs-doublet model involving an additional scalar with couplings to the top-quark and the three up-type quarks (rho(tt),rho(tc), and rho(tu)). The targeted signals lead to final states with either a same-sign top-quark pair, three top-quarks, or four top-quarks. The search is based on a data sample of proton-proton collisions at root s = 13 TeV recorded with the ATLAS detector during Run 2 of the Large Hadron Collider, corresponding to an integrated luminosity of 139 fb(-1). Events are categorised depending on the multiplicity of light charged leptons (electrons or muons), total lepton charge, and a deep-neural-network output to enhance the purity of each of the signals. Masses of an additional scalar boson mH between 200- 630 GeV with couplings rho(tt) = 0.4, rho(tc) = 0.2, and rho(tu) = 0.2 are excluded at 95% confidence level. Additional interpretations are provided in models of R-parity violating supersymmetry, motivated by the recent flavour and ( g - 2) (mu) anomalies.
Published: 2023

24. Search for flavour-changing neutral tqH interactions with H -> gamma gamma in pp collisions at root s=13 TeV using the ATLAS detector

Author: European Commission, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Aikot, Arya, Amos, K.R., Aparisi, Pozo, Bailey, A.J., Bouchhar, Naseem, Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Chitishvili, Mariam, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R, Lacasta Llácer, Carlos, Martí García, Salvador, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valiente Moreno, Enrique, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, ATLAS Collaboration, European Commission, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Aikot, Arya, Amos, K.R., Aparisi, Pozo, Bailey, A.J., Bouchhar, Naseem, Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Chitishvili, Mariam, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R, Lacasta Llácer, Carlos, Martí García, Salvador, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valiente Moreno, Enrique, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, and ATLAS Collaboration
Abstract: A search for flavour-changing neutral interactions involving the top quark, the Higgs boson and an up-type quark q ( q = c, u) is presented. The proton-proton collision data set used, with an integrated luminosity of 139 fb(-1), was collected at root s = 13TeV by the ATLAS experiment at the Large Hadron Collider. Both the decay process t -> qH in tt production and the production process pp. tH, with the Higgs boson decaying into two photons, are investigated. No significant excess is observed and upper limits are set on the t. cH and the t. uH branching ratios of 4.3x10(-4) and 3.8x10(-4), respectively, at the 95% confidence level, while the expected limits in the absence of signal are 4.7x10(-4) and 3.9x10(-4). Combining this search with ATLAS searches in the H. t+ t- and H. b b final states yields observed (expected) upper limits on the t -> cH branching ratio of 5.8 x 10(-4) (3.0 x 10(-4)) at the 95% confidence level. The corresponding observed (expected) upper limit on the t -> uH branching ratio is 4.0 x 10(-4) (2.4 x 10(-4)).
Published: 2023

25. Search for displaced photons produced in exotic decays of the Higgs boson using 13 TeV pp collisions with the ATLAS detector

Author: American Physical Society, Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, ATLAS Collaboration, American Physical Society, Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, and ATLAS Collaboration
Abstract: A search is performed for delayed and nonpointing photons originating from the displaced decay of a neutral long-lived particle (LLP). The analysis uses the full run 2 dataset of proton-proton collisions delivered by the LHC at a center-of-mass energy of Formula Presented between 2015 and 2018 and recorded by the ATLAS detector, corresponding to an integrated luminosity of Formula Presented. The capabilities of the ATLAS electromagnetic calorimeter are exploited to precisely measure the arrival times and trajectories of photons. The results are interpreted in a scenario where the LLPs are pair produced in exotic decays of the 125 GeV Higgs boson, and each LLP subsequently decays into a photon and a particle that escapes direct detection, giving rise to missing transverse momentum. No significant excess is observed above the expectation due to Standard Model background processes. The results are used to set upper limits on the branching ratio of the exotic decay of the Higgs boson. A model-independent limit is also set on the production of photons with large values of displacement and time delay.
Published: 2023

26. Pursuit of paired dijet resonances in the Run 2 dataset with ATLAS

Author: European Commission, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Aikot, Arya, Amos, K.R., Aparisi, Pozo, Aparisi, Pozo, J.A., Bailey, A.J., Bouchhar, Naseem, Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Chitishvili, Mariam, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R, Lacasta Llácer, Carlos, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valiente Moreno, Enrique, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, ATLAS Collaboration, European Commission, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Aikot, Arya, Amos, K.R., Aparisi, Pozo, Aparisi, Pozo, J.A., Bailey, A.J., Bouchhar, Naseem, Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Chitishvili, Mariam, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R, Lacasta Llácer, Carlos, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valiente Moreno, Enrique, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, and ATLAS Collaboration
Abstract: New particles with large masses that decay into hadronically interacting particles are predicted by many models of physics beyond the Standard Model. A search for a massive resonance that decays into pairs of dijet resonances is performed using 140 fb(-1) of proton-proton collisions at ffiffiffisp root s = 13 TeV recorded by the ATLAS detector during Run 2 of the Large Hadron Collider. Resonances are searched for in the invariant mass of the tetrajet system, and in the average invariant mass of the pair of dijet systems. A data-driven background estimate is obtained by fitting the tetrajet and dijet invariant mass distributions with a four-parameter dijet function and a search for local excesses from resonant production of dijet pairs is performed. No significant excess of events beyond the Standard Model expectation is observed, and upper limits are set on the production cross sections of new physics scenarios.
Published: 2023

27. Anomaly detection search for new resonances decaying into a Higgs boson and a generic new particle X in hadronic final states using Formula Presented pp collisions with the ATLAS detector

Author: European Commission, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, ATLAS Collaboration, European Commission, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, and ATLAS Collaboration
Abstract: A search is presented for a heavy resonance Formula Presented decaying into a Standard Model Higgs boson Formula Presented and a new particle Formula Presented in a fully hadronic final state. The full Large Hadron Collider run 2 dataset of proton-proton collisions at Formula Presented collected by the ATLAS detector from 2015 to 2018 is used and corresponds to an integrated luminosity of Formula Presented. The search targets the high Formula Presented-mass region, where the Formula Presented and Formula Presented have a significant Lorentz boost in the laboratory frame. A novel application of anomaly detection is used to define a general signal region, where events are selected solely because of their incompatibility with a learned background-only model. It is constructed using a jet-level tagger for signal-model-independent selection of the boosted Formula Presented particle, representing the first application of fully unsupervised machine learning to an ATLAS analysis. Two additional signal regions are implemented to target a benchmark Formula Presented decay into two quarks, covering topologies where the Formula Presented is reconstructed as either a single large-radius jet or two small-radius jets. The analysis selects Higgs boson decays into Formula Presented, and a dedicated neural-network-based tagger provides sensitivity to the boosted heavy-flavor topology. No significant excess of data over the expected background is observed, and the results are presented as upper limits on the production cross section Formula Presented) for signals with Formula Presented between 1.5 and 6 TeV and Formula Presented between 65 and 3000 GeV.
Published: 2023

28. Search for nonresonant pair production of Higgs bosons in the Formula Presented final state in pp collisions at Formula Presented with the ATLAS detector

Author: European Commission, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Bouchhar, Naseem, Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Chitishvili, Mariam, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Lacasta Llácer, Carlos, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, ATLAS Collaboration, European Commission, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Bouchhar, Naseem, Cabrera, Susana, Cantero, Josu, Cardillo, Fabio, Castillo Mª Victoria, Chitishvili, Mariam, Costa, María José, Didenko, Mariia, Escobar, Carlos, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, Gomez Delegido, A.J., González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Lacasta Llácer, Carlos, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Muñoz Perez, David, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Rubio Jiménez, Adrián, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Senthilkumar, Varsha, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Varriale, Lorenzo, Villaplana Pérez, Miguel, Vos, Marcel, and ATLAS Collaboration
Abstract: A search for nonresonant Higgs boson pair production in the Formula Presented final state is presented. The analysis uses Formula Presented of Formula Presented collision data at Formula Presented collected with the ATLAS detector at the Large Hadron Collider, and targets both the gluon-gluon fusion and vector-boson fusion production modes. No evidence of the signal is found and the observed (expected) upper limit on the cross section for nonresonant Higgs boson pair production is determined to be 5.4 (8.1) times the Standard Model predicted cross section at 95% confidence level. Constraints are placed on modifiers to the Formula Presented and Formula Presented couplings. The observed (expected) Formula Presented constraints on the Formula Presented coupling modifier, Formula Presented, are determined to be Formula Presented (Formula Presented), while the corresponding constraints for the Formula Presented coupling modifier, Formula Presented, are Formula Presented (Formula Presented). In addition, constraints on relevant coefficients are derived in the context of the Standard Model effective field theory and Higgs effective field theory, and upper limits on the Formula Presented production cross section are placed in seven Higgs effective field theory benchmark scenarios.
Published: 2023

29. Desarrollo y validación inicial de una escala para evaluar la fidelidad de los consumidores hacia las tiendas

Author: García García, Carmen and Fabero Fernández de Marcos, Marina
Published: 2015
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30. Performance of Deep Learning pickers in routine network processing applications

Author: Ministerio de Ciencia, Innovación y Universidades (España), Fernández-Prieto, Luis, García Navarro, José Enrique, Villaseñor, Antonio, Sanz, Verónica, Ammirati, Jean-Baptiste, Díaz Suárez, Eduardo A., García García, Carmen, Ministerio de Ciencia, Innovación y Universidades (España), Fernández-Prieto, Luis, García Navarro, José Enrique, Villaseñor, Antonio, Sanz, Verónica, Ammirati, Jean-Baptiste, Díaz Suárez, Eduardo A., and García García, Carmen
Abstract: In recent years there have been a great progress in earthquake detection and picking arrival times of P and S phases using Deep Learning algorithms. However, the general adoption of these methods for the routine processing of monitoring networks has been held back by factors such as the availability of well documented software, computational resources, and a gap in knowledge of these methods. We have analyzed recent available Deep Learning pickers, comparing the results against data picked by a human operartor and against non-Deep Learning programs. We have used data recorded in several locations, with different characteristics and triggering mechanisms, such as volcanic eruptions, induced seismicity and local eartquakes, recorded using different types of instruments. We have found that the Deep Learning algorithms are able to achieve results comparables to a human operator, and several times better than a classical program, specially in data with a low signal to noise ratio. They are very efficient at ignoring large amplitude transient noise and at picking S waves, a task that is often difficult even for experienced analysts, and they require very few parameters to tune (often only the probability threshold) so an in-depth knowledge of neural networks is not required
Published: 2022

31. A search for an unexpected asymmetry in the production of e(+)mu(-) and e(-)mu(+) pairs in proton-proton collisions recorded by the ATLAS detector at root s=13 TeV

Author: Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Estrada, Oscar, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Mamuzic, Judita, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Villaplana Pérez, Miguel, Vos, Marcel, ATLAS Collaboration, Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Estrada, Oscar, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Mamuzic, Judita, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Villaplana Pérez, Miguel, Vos, Marcel, and ATLAS Collaboration
Abstract: This search, a type not previously performed at ATLAS, uses a comparison of the production cross sections for e(+)mu(-) and e(-)mu(+) pairs to constrain physics processes beyond the Standard Model. It uses 139 fb(-1) of proton-proton collision data recorded at root s = 13 TeV at the LHC. Targeting sources of new physics which prefer final states containing e(+)mu(-) and e(-)mu(+), the search contains two broad signal regions which are used to provide model-independent constraints on the ratio of cross sections at the 2% level. The search also has two special selections targeting supersymmetric models and leptoquark signatures. Observations using one of these selections are able to exclude, at 95% confidence level, singly produced smuons with masses up to 640 GeV in a model in which the only other light sparticle is a neutralino when the R-parity-violating coupling lambda(23)(1)' is close to unity. Observations using the other selection exclude scalar leptoquarks with masses below 1880 GeV when g(1R)(eu) = g(1R)(mu c) = 1, at 95% confidence level. The limit on the coupling reduces to g(1R)(eu) = g(1R)(mu c) = 0.46 for a mass of 1420 GeV.
Published: 2022

32. Medidas para la reducción de la pobreza energética en Usera

Author: Sánchez-Guevara Sánchez, María del Carmen, García García, Carmen, Sánchez-Guevara Sánchez, María del Carmen, and García García, Carmen
Abstract: Madrid es una ciudad que sufre actualmente el problema denominado pobreza energética, que supone la ausencia de bienestar en los hogares por no cubrir sus necesidades básicas de energía debido a la insuficiencia de sus recursos. El nivel de ingresos, la baja eficiencia de los edificios en los que se habita, el alto precio de la energía y el clima urbano, son algunos de los factores más determinantes a la hora de calificar el nivel de pobreza energética en el que se encuentra un hogar. A causa del aumento de las temperaturas, este problema se está viendo poco a poco más agravado, independientemente de los otros factores, ya que cada vez va a ser más complicado mantener una vivienda a una temperatura adecuada durante los meses de verano. Se deberá refrigerar el ambiente interior a partir de unas estrategias pasivas o activas, y la demanda de refrigeración aumentará, por lo que está siendo cada vez más necesario tomar medidas al respecto con el fin de mejorar las condiciones de habitabilidad de los hogares que se encuentran en esa situación de pobreza energética. La mejora del edificio, así como sus materiales o cómo estén diseñados, es una de las soluciones más directas y eficaces para disminuir el consumo de energía y reducir así la pobreza energética. La situación de un hogar con un bajo nivel de ingresos pero que vive en una vivienda bien aislada es muy diferente a la de un hogar que vive en una vivienda donde las pérdidas energéticas son muy altas.
Published: 2022

33. Performance of Deep Learning Pickers in Routine Network Processing Applications

Author: European Commission, Generalitat Valenciana, Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), García Navarro, José Enrique, Fernández-Prieto, Luis, Villaseñor, Antonio, Sanz, Verónica, Ammirati, Jean-Baptiste, Díaz Suárez, Eduardo A., García García, Carmen, European Commission, Generalitat Valenciana, Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), García Navarro, José Enrique, Fernández-Prieto, Luis, Villaseñor, Antonio, Sanz, Verónica, Ammirati, Jean-Baptiste, Díaz Suárez, Eduardo A., and García García, Carmen
Abstract: Picking arrival times of P and S phases is a fundamental and time‐consuming task for the routine processing of seismic data acquired by permanent and temporary networks. A large number of automatic pickers have been developed, but to perform well they often require the tuning of multiple parameters to adapt them to each dataset. Despite the great advance in techniques, some problems remain, such as the difficulty to accurately pick S waves and earthquake recordings with a low signal‐to‐noise ratio. Recently, phase pickers based on deep learning (DL) have shown great potential for event identification and arrival‐time picking. However, the general adoption of these methods for the routine processing of monitoring networks has been held back by factors such as the availability of well‐documented software, computational resources, and a gap in knowledge of these methods. In this study, we evaluate recent available DL pickers for earthquake data, comparing the performance of several neural network architectures. We test the selected pickers using three datasets with different characteristics. We found that the analyzed DL pickers (generalized phase detection, PhaseNet, and EQTransformer) perform well in the three tested cases. They are very efficient at ignoring large‐amplitude transient noise and at picking S waves, a task that is often difficult even for experienced analysts. Nevertheless, the performance of the analyzed DL pickers varies widely in terms of sensitivity and false discovery rate, with some pickers missing a significant percentage of true picks and others producing a large number of false positives. There are also variations in run time between DL pickers, with some of them requiring significant resources to process large datasets. In spite of these drawbacks, we show that DL pickers can be used efficiently to process large seismic datasets and obtain results comparable or better than current standard procedures
Published: 2022

34. Search for associated production of a Z boson with an invisibly decaying Higgs boson or dark matter candidates at s=13 TeV with the ATLAS detector

Author: Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), https://ror.org/02gfc7t72, Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Estrada, Oscar, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Mamuzic, Judita, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Villaplana Pérez, Miguel, Vos, Marcel, ATLAS Collaboration, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), https://ror.org/02gfc7t72, Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Estrada, Oscar, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Mamuzic, Judita, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Villaplana Pérez, Miguel, Vos, Marcel, and ATLAS Collaboration
Abstract: A search for invisible decays of the Higgs boson as well as searches for dark matter candidates, produced together with a leptonically decaying Z boson, are presented. The analysis is performed using proton−proton collisions at a centre-of-mass energy of 13 TeV, delivered by the LHC, corresponding to an integrated luminosity of 139 fb and recorded by the ATLAS experiment. Assuming Standard Model cross-sections for ZH production, the observed (expected) upper limit on the branching ratio of the Higgs boson to invisible particles is found to be 19% (19%) at the 95% confidence level. Exclusion limits are also set for simplified dark matter models and two-Higgs-doublet models with an additional pseudoscalar mediator.
Published: 2022

35. Measurements of the Higgs boson inclusive and differential fiducial cross-sections in the diphoton decay channel with pp collisions at √s = 13 TeV with the ATLAS detector

Author: European Commission, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Estrada, Oscar, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Mamuzic, Judita, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Villaplana Pérez, Miguel, Vos, Marcel, ATLAS Collaboration, European Commission, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Estrada, Oscar, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Mamuzic, Judita, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Villaplana Pérez, Miguel, Vos, Marcel, and ATLAS Collaboration
Abstract: A measurement of inclusive and differential fiducial cross-sections for the production of the Higgs boson decaying into two photons is performed using 139 fb of proton-proton collision data recorded at s = 13 TeV by the ATLAS experiment at the Large Hadron Collider. The inclusive cross-section times branching ratio, in a fiducial region closely matching the experimental selection, is measured to be 67 ± 6 fb, which is in agreement with the state-of-the-art Standard Model prediction of 64 ± 4 fb. Extrapolating this result to the full phase space and correcting for the branching ratio, the total cross-section for Higgs boson production is estimated to be 58 ± 6 pb. In addition, the cross-sections in four fiducial regions sensitive to various Higgs boson production modes and differential cross-sections as a function of either one or two of several observables are measured. All the measurements are found to be in agreement with the Standard Model predictions. The measured transverse momentum distribution of the Higgs boson is used as an indirect probe of the Yukawa coupling of the Higgs boson to the bottom and charm quarks. In addition, five differential cross-section measurements are used to constrain anomalous Higgs boson couplings to vector bosons in the Standard Model effective field theory framework. [Figure not available: see fulltext.]
Published: 2022

36. Measurement of the polarisation of single top quarks and antiquarks produced in the t-channel at √s = 13 TeV and bounds on the tWb dipole operator from the ATLAS experiment

Author: European Commission, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Estrada, Oscar, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Mamuzic, Judita, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Moreno Llácer, María, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Villaplana Pérez, Miguel, Vos, Marcel, ATLAS Collaboration, European Commission, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Estrada, Oscar, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Mamuzic, Judita, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Moreno Llácer, María, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Villaplana Pérez, Miguel, Vos, Marcel, and ATLAS Collaboration
Abstract: A simultaneous measurement of the three components of the top-quark and top-antiquark polarisation vectors in t-channel single-top-quark production is presented. This analysis is based on data from proton–proton collisions at a centre-of-mass energy of 13 TeV corresponding to an integrated luminosity of 139 fb, collected with the ATLAS detector at the LHC. Selected events contain exactly one isolated electron or muon, large missing transverse momentum and exactly two jets, one being b-tagged. Stringent selection requirements are applied to discriminate t-channel single-top-quark events from the background contributions. The top-quark and top-antiquark polarisation vectors are measured from the distributions of the direction cosines of the charged-lepton momentum in the top-quark rest frame. The three components of the polarisation vector for the selected top-quark event sample are Px′ = 0.01 ± 0.18, Py′ = −0.029 ± 0.027, Pz′ = 0.91 ± 0.10 and for the top-antiquark event sample they are Px′ = −0.02 ± 0.20, Py′ = −0.007 ± 0.051, Pz′ = 0.79 ± 0.16. Normalised differential cross-sections corrected to a fiducial region at the stable-particle level are presented as a function of the charged-lepton angles for top-quark and top-antiquark events inclusively and separately. These measurements are in agreement with Standard Model predictions. The angular differential cross-sections are used to derive bounds on the complex Wilson coefficient of the dimension-six O operator in the framework of an effective field theory. The obtained bounds are C ∈ [−0.9, 1.4] and C ∈ [−0.8, 0.2], both at 95% confidence level. [Figure not available: see fulltext.].
Published: 2022

37. Constraints on Higgs boson production with large transverse momentum using H →b b ¯ decays in the ATLAS detector

Author: European Commission, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Estrada, Oscar, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Mamuzic, Judita, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Villaplana Pérez, Miguel, Vos, Marcel, ATLAS Collaboration, European Commission, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Estrada, Oscar, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Mamuzic, Judita, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Villaplana Pérez, Miguel, Vos, Marcel, and ATLAS Collaboration
Abstract: This paper reports constraints on Higgs boson production with transverse momentum above 1 TeV. The analyzed data from proton-proton collisions at a center-of-mass energy of 13 TeV were recorded with the ATLAS detector at the Large Hadron Collider from 2015 to 2018 and correspond to an integrated luminosity of 136 fb-1. Higgs bosons decaying into bb¯ are reconstructed as single large-radius jets recoiling against a hadronic system and are identified by the experimental signature of two b-hadron decays. The experimental techniques are validated in the same kinematic regime using the Z→bb¯ process. The 95% confidence-level upper limit on the cross section for Higgs boson production with transverse momentum above 450 GeV is 115 fb, and above 1 TeV it is 9.6 fb. The Standard Model cross section predictions for a Higgs boson with a mass of 125 GeV in the same kinematic regions are 18.4 fb and 0.13 fb, respectively.
Published: 2022

38. Measurement of Higgs boson decay into b-quarks in associated production with a top-quark pair in pp collisions at √s = 13 TeV with the ATLAS detector

Author: European Commission, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Estrada, Oscar, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Mamuzic, Judita, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Villaplana Pérez, Miguel, Vos, Marcel, ATLAS Collaboration, European Commission, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Agencia Estatal de Investigación (España), Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cardillo, Fabio, Castillo Mª Victoria, Costa, María José, Didenko, Mariia, Escobar, Carlos, Estrada, Oscar, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Mamuzic, Judita, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Villaplana Pérez, Miguel, Vos, Marcel, and ATLAS Collaboration
Abstract: The associated production of a Higgs boson and a top-quark pair is measured in events characterised by the presence of one or two electrons or muons. The Higgs boson decay into a b-quark pair is used. The analysed data, corresponding to an integrated luminosity of 139 fb, were collected in proton-proton collisions at the Large Hadron Collider between 2015 and 2018 at a centre-of-mass energy of s = 13 TeV. The measured signal strength, defined as the ratio of the measured signal yield to that predicted by the Standard Model, is 0.35−0.34+0.36. This result is compatible with the Standard Model prediction and corresponds to an observed (expected) significance of 1.0 (2.7) standard deviations. The signal strength is also measured differentially in bins of the Higgs boson transverse momentum in the simplified template cross-section framework, including a bin for specially selected boosted Higgs bosons with transverse momentum above 300 GeV. [Figure not available: see fulltext.]
Published: 2022

39. Best Practices for Training in Sustainable Greenhouse Horticulture.

Author: De Witte, Ralph, Janssen, Dirk, Sayadi Gmada, Samir, and García-García, Carmen
Abstract: Consumer demands and current legislation require intensive greenhouse horticulture to be sustainable. This poses the challenge of how to teach the concept of sustainable horticulture to all professionals involved in farming. The province of Almeria, in the south-east of Spain, is one of the major horticulture greenhouse areas in Europe, and an expert panel of relevant stakeholders was invited to look into the best pedagogical practices and methods to transfer technology and knowledge, with the goal of improving the sustainability of greenhouse horticulture. A combination of an online questionnaire, a Delphi method, and desk research was, therefore, used as the strategy to collect the data and implement the research design during 2021. On-farm/business demonstrations, virtual education, and classroom education were common pedagogical methods used. On-farm/business demonstrations, participatory education, and co-learning were identified as the best pedagogical methods to use in sustainable agriculture/horticulture training. The expert panel also concluded that participatory education and co-learning should be further explored whereas virtual and classroom education should play a less dominant role in the training activities. This knowledge can help training organizations and designers to avoid common mistakes, tailor their training activities, and be mindful of common barriers and (mis)conceptions. [ABSTRACT FROM AUTHOR]
Published: 2023
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40. Medidas para la reducción de la pobreza energética en Usera

Author: García García, Carmen and Sánchez-Guevara Sánchez, María del Carmen
Subjects: Arquitectura, Urbanismo
Abstract: Madrid es una ciudad que sufre actualmente el problema denominado pobreza energética, que supone la ausencia de bienestar en los hogares por no cubrir sus necesidades básicas de energía debido a la insuficiencia de sus recursos. El nivel de ingresos, la baja eficiencia de los edificios en los que se habita, el alto precio de la energía y el clima urbano, son algunos de los factores más determinantes a la hora de calificar el nivel de pobreza energética en el que se encuentra un hogar. A causa del aumento de las temperaturas, este problema se está viendo poco a poco más agravado, independientemente de los otros factores, ya que cada vez va a ser más complicado mantener una vivienda a una temperatura adecuada durante los meses de verano. Se deberá refrigerar el ambiente interior a partir de unas estrategias pasivas o activas, y la demanda de refrigeración aumentará, por lo que está siendo cada vez más necesario tomar medidas al respecto con el fin de mejorar las condiciones de habitabilidad de los hogares que se encuentran en esa situación de pobreza energética. La mejora del edificio, así como sus materiales o cómo estén diseñados, es una de las soluciones más directas y eficaces para disminuir el consumo de energía y reducir así la pobreza energética. La situación de un hogar con un bajo nivel de ingresos pero que vive en una vivienda bien aislada es muy diferente a la de un hogar que vive en una vivienda donde las pérdidas energéticas son muy altas.
Published: 2022

41. Bustarviejo. Propuestas bioclimáticas en el espacio público

Author: Córdoba Hernández, Rafael, Román López, María Emilia, Agudo García, Javier, Álvarez Urrutia, Javier, Benítez Gómez, Vanesa, Cano García, Fernando, Carro Novo, Alberto, de la Barba Suárez, Elena, de la Gándara Bustos, Elena, de Lucas Salgado, Juan Manuel, Díaz Quiroga, Alejandro, Echeita Presedo, Guillermo, Fernández Laiño, Andrea, Galanche Sendín, Alejandra, García Fernández, Ayelén, García García, Carmen, García Prado, Santiago, Garrido Moñino, Álvaro, Higueras García, Ester, Leceta Molina, Ignacio, López Mendizábal, Paula, Martí Guitera, Lucas, Martínez Molinero, Odila, Mayoral Vallés, Isabel, Novo Muñoz, Patricia, Pinto Álvarez, Paula Belén, Prieto Miñano, Miguel Ángel, Ramos del Cerro, Luis Miguel, Rodríguez Cadenas de Llano, Iván, Rodríguez Torres, Laura, Simón Rojo, Marian, Tamayo Palacios, Alejandro, Vecoña Otero, Ana, and Verdaguer Viana-Cárdenas, Carlos
Subjects: Arquitectura, Urbanismo
Abstract: Bustarviejo. Propuestas bioclimáticas en el espacio público. Publicación digital de los trabajos elaborados por los estudiantes del curso 2017/18 de la asignatura La Ciudad y el Medio de la Escuela Técnica Superior de Arquitectura de Madrid de la Universidad Politécnica de Madrid. Muestra una serie de propuestas elaboradas en la asignatura para mejorar bioclimáticamente diferentes espacios públicos municipales en el marco del acuerdo realizado entre el Departamento de Urbanística y Ordenación del Territorio y el Excmo. Ayuntamiento de Bustarviejo (Madrid).
Published: 2021

42. La cara amable y el lado oscuro de las reformas de las autoridades de competencia

Author: Borrell, Joan-Ramon, Jiménez González, Juan Luis, and García García, Carmen
Subjects: Competent authority, Competition, Reform, Competència (Dret), Competència econòmica, Comparative government, Institucions polítiques, Reforma
Abstract: Competition policy is a dynamic process in which two questions arise: the configuration of the institutional framework and, on the other hand, the potential negative effects of the reforms processes. Based on surveys to employers (International Institute for Management Development, IMD), this paper evaluates the evolution of the effectiveness of competition policy at international level and how some countries' competition policy (or authority) reforms change this perceived effectiveness: United Kingdom, France, Netherlands, Finland and Spain. Results show that the last Spanish competition policy reform (creation of the CNMC), was non-positive, despite some improvements in recent years.
Published: 2021

43. Search for Heavy Resonances Decaying into a Photon and a Hadronically Decaying Higgs Boson in pp Collisions at s =13 TeV with the ATLAS Detector

Author: ATLAS Collaboration, Aparisi Pozo, J.A., Bailey, A.J., Cabrera, Susana, Castillo, F.L., Castillo Mª Victoria, Cerda Alberich, L., Costa, María José, Escobar, Carlos, Estrada, Oscar, Ferrer, Antonio, Fiorini, L., Fuster, Juan, Fullana, Esteban, García García, Carmen, García Navarro, José Enrique, González de la Hoz, Santiago, Guerrero Rojas, J.G.R., Gonzalvo Rodríguez, Galo Rafael, Higón, Emilio, Lozano Bahilo, José J., Lacasta Llácer, Carlos, Mamuzic, Judita, Madaffari, Daniele, Martí García, Salvador, Miñano Moya, M., Moreno Llácer, María, Rodriguez Bosca, S., Rodriguez Rodriguez, D., Ruiz Martínez, Arantxa, Salt, José, Santra, A., Soldevila, Urmila, Sánchez Martínez, Javier, Valls Ferrer, Juan Antonio, Valero, Alberto, Vos, Marcel, and Ministerio de Ciencia, Innovación y Universidades (España)
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: This Letter presents a search for the production of new heavy resonances decaying into a Higgs boson and a photon using proton-proton collision data at s=13 TeV collected by the ATLAS detector at the LHC. The data correspond to an integrated luminosity of 139 fb-1. The analysis is performed by reconstructing hadronically decaying Higgs boson (H→bb¯) candidates as single large-radius jets. A novel algorithm using information about the jet constituents in the center-of-mass frame of the jet is implemented to identify the two b quarks in the single jet. No significant excess of events is observed above the expected background. Upper limits are set on the production cross-section times branching fraction for narrow spin-1 resonances decaying into a Higgs boson and a photon in the resonance mass range from 0.7 to 4 TeV, cross-section times branching fractions are excluded between 11.6 fb and 0.11 fb at a 95% confidence level.
Published: 2020

44. Search for Higgs Boson Decays into a Z Boson and a Light Hadronically Decaying Resonance Using 13 TeV pp Collision Data from the ATLAS Detector

Author: ATLAS Collaboration, Aparisi Pozo, J.A., Bailey, A.J., Cabrera, Susana, Castillo, F.L., Castillo Mª Victoria, Costa, María José, Escobar, Carlos, Estrada, Oscar, Ferrer, Antonio, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Madaffari, Daniele, Mamuzic, Judita, Martí García, Salvador, Martinez Agullo, Pablo, Mitsou, Vasiliki A., Miñano Moya, M., Poveda, Joaquín, Moreno Llácer, María, Rodriguez Bosca, S., Ruiz Martínez, Arantxa, Salt, José, Santra, A, Sayago Galvan, Ivan, Soldevila, Urmila, Sánchez Martínez, Javier, Valero, Alberto, Valls Ferrer, Juan Antonio, Vos, Marcel, Ministerio de Economía y Competitividad (España), and Ministerio de Ciencia, Innovación y Universidades (España)
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: A search for Higgs boson decays into a Z boson and a light resonance in two-lepton plus jet events is performed, using a pp collision dataset with an integrated luminosity of 139 fb-1 collected at s=13 TeV by the ATLAS experiment at the CERN LHC. The resonance considered is a light boson with a mass below 4 GeV from a possible extended scalar sector or a charmonium state. Multivariate discriminants are used for the event selection and for evaluating the mass of the light resonance. No excess of events above the expected background is found. Observed (expected) 95% confidence-level upper limits are set on the Higgs boson production cross section times branching fraction to a Z boson and the signal resonance, with values in the range 17-340 pb (16-5+6-320-90+130 pb) for the different light spin-0 boson mass and branching fraction hypotheses, and with values of 110 and 100 pb (100-30+40 and 100-30+40 pb) for the ηc and J/ψ hypotheses, respectively.
Published: 2020

45. CP Properties of Higgs Boson Interactions with Top Quarks in the t t ¯ H and tH Processes Using H →γγ with the ATLAS Detector

Author: ATLAS Collaboration, Aparisi Pozo, J.A., Bailey, A.J., Cabrera, Susana, Castillo, F.L., Castillo Mª Victoria, Costa, María José, Escobar, Carlos, Estrada, Oscar, Ferrer, Antonio, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Madaffari, Daniele, Mamuzic, Judita, Martí García, Salvador, Martinez Agullo, Pablo, Mitsou, Vasiliki A., Moreno Llácer, María, Poveda, Joaquín, Rodriguez Bosca, S., Ruiz Martínez, Arantxa, Salt, José, Santra, A., Sayago Galvan, Ivan, Soldevila, Urmila, Sánchez Martínez, Javier, Valero, Alberto, Valls Ferrer, Juan Antonio, Vos, Marcel, Miralles López, Marcos, Ministerio de Economía y Competitividad (España), and Ministerio de Ciencia, Innovación y Universidades (España)
Subjects: High Energy Physics::Experiment
Abstract: A study of the charge conjugation and parity (CP) properties of the interaction between the Higgs boson and top quarks is presented. Higgs bosons are identified via the diphoton decay channel (H→γγ), and their production in association with a top quark pair (tt¯H) or single top quark (tH) is studied. The analysis uses 139 fb-1 of proton-proton collision data recorded at a center-of-mass energy of s=13 TeV with the ATLAS detector at the Large Hadron Collider. Assuming a CP-even coupling, the tt¯H process is observed with a significance of 5.2 standard deviations. The measured cross section times H→γγ branching ratio is 1.64-0.36+0.38(stat)-0.14+0.17(sys) fb, and the measured rate for tt¯H is 1.43-0.31+0.33(stat)-0.15+0.21(sys) times the Standard Model expectation. The tH production process is not observed and an upper limit on its rate of 12 times the Standard Model expectation is set. A CP-mixing angle greater (less) than 43 (-43)° is excluded at 95% confidence level.
Published: 2020

46. Search for long-lived, massive particles in events with a displaced vertex and a muon with large impact parameter in pp collisions at s =13 TeV with the ATLAS detector

Author: ATLAS Collaboration, Aparisi Pozo, J.A., Bailey, A.J., Cabrera, Susana, Castillo, F.L., Castillo Mª Victoria, Cerda Alberich, L., Costa, María José, Escobar, Carlos, Estrada, Oscar, Ferrer, Antonio, Fiorini, L., Fuster, Juan, Fullana, Esteban, García García, Carmen, García Navarro, José Enrique, González de la Hoz, Santiago, Guerrero Rojas, J.G.R., Gonzalvo Rodríguez, Galo Rafael, Lacasta Llácer, Carlos, Higón, Emilio, Madaffari, Daniele, Mamuzic, Judita, Martí García, Salvador, Lozano Bahilo, José J., Mitsou, Vasiliki A., Moreno Llácer, María, Miñano Moya, M., Rodriguez Bosca, S., Ruiz Martínez, Arantxa, Rodriguez Rodriguez, D., Salt, José, Santra, A, Soldevila, Urmila, Sánchez Martínez, Javier, Valero, Alberto, Valls Ferrer, Juan Antonio, Vos, Marcel, Ministerio de Economía y Competitividad (España), and Ministerio de Ciencia, Innovación y Universidades (España)
Subjects: Physics::Instrumentation and Detectors, High Energy Physics::Experiment
Abstract: A search for long-lived particles decaying into hadrons and at least one muon is presented. The analysis selects events that pass a muon or missing-transverse-momentum trigger and contain a displaced muon track and a displaced vertex. The analyzed dataset of proton-proton collisions at s=13 TeV was collected with the ATLAS detector and corresponds to 136 fb-1. The search employs dedicated reconstruction techniques that significantly increase the sensitivity to long-lived particle decays that occur in the ATLAS inner detector. Background estimates for Standard Model processes and instrumental effects are extracted from data. The observed event yields are compatible with those expected from background processes. The results are presented as limits at 95% confidence level on model-independent cross sections for processes beyond the Standard Model, and interpreted as exclusion limits in scenarios with pair production of long-lived top squarks that decay via a small R-parity-violating coupling into a quark and a muon. Top squarks with masses up to 1.7 TeV are excluded for a lifetime of 0.1 ns, and masses below 1.3 TeV are excluded for lifetimes between 0.01 ns and 30 ns.
Published: 2020

47. Search for heavy neutral Higgs bosons produced in association with b-quarks and decaying into b-quarks at s =13 TeV with the ATLAS detector

Author: ATLAS Collaboration, Álvarez Piqueras, D., Aparisi Pozo, J.A., Cabrera, Susana, Castillo, F.L., Castillo Mª Victoria, Cerda Alberich, L., Costa, María José, Escobar, Carlos, Estrada, Oscar, Ferrer, Antonio, Fiorini, L., Fuster, Juan, Fullana, Esteban, García García, Carmen, García Navarro, José Enrique, González de la Hoz, Santiago, Guerrero Rojas, J.G.R., Gonzalvo Rodríguez, Galo Rafael, Lacasta Llácer, Carlos, Higón, Emilio, Madaffari, Daniele, Mamuzic, Judita, Martí García, Salvador, Melini, Davide, Mitsou, Vasiliki A., Bailey, A.J., Miñano Moya, M., Rodriguez Bosca, S., Moreno Llácer, María, Lozano Bahilo, José J., Ruiz Martínez, Arantxa, Rodriguez Rodriguez, D., Santra, A., Salt, José, Soldevila, Urmila, Valero, Alberto, Valls Ferrer, Juan Antonio, Vos, Marcel, Sánchez Martínez, Javier, Ministerio de Economía y Competitividad (España), and Ministerio de Ciencia, Innovación y Universidades (España)
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment, Nuclear Experiment
Abstract: A search for heavy neutral Higgs bosons produced in association with one or two b-quarks and decaying to b-quark pairs is presented using 27.8 fb-1 of s=13 TeV proton-proton collision data recorded by the ATLAS detector at the Large Hadron Collider during 2015 and 2016. No evidence of a signal is found. Upper limits on the heavy neutral Higgs boson production cross section times its branching ratio to bb¯ are set, ranging from 4.0 to 0.6 pb at 95% confidence level over a Higgs boson mass range of 450 to 1400 GeV. Results are interpreted within the two-Higgs-doublet model and the minimal supersymmetric Standard Model.
Published: 2020

48. Search for Heavy Higgs Bosons Decaying into Two Tau Leptons with the ATLAS Detector Using pp Collisions at s =13 TeV

Author: ATLAS Collaboration, Aparisi Pozo, J.A., Bailey, A.J., Cabrera, Susana, Castillo, F.L., Castillo Mª Victoria, Cerda Alberich, L., Costa, María José, Escobar, Carlos, Estrada, Oscar, Ferrer, Antonio, Fiorini, L., Fuster, Juan, Fullana, Esteban, García García, Carmen, García Navarro, José Enrique, González de la Hoz, Santiago, Guerrero Rojas, J.G.R., Gonzalvo Rodríguez, Galo Rafael, Higón, Emilio, Lozano Bahilo, José J., Lacasta Llácer, Carlos, Mamuzic, Judita, Madaffari, Daniele, Martí García, Salvador, Miñano Moya, M., Moreno Llácer, María, Rodriguez Bosca, S., Rodriguez Rodriguez, D., Ruiz Martínez, Arantxa, Salt, José, Santra, A., Soldevila, Urmila, Sánchez Martínez, Javier, Valls Ferrer, Juan Antonio, Valero, Alberto, and Vos, Marcel
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: A search for heavy neutral Higgs bosons is performed using the LHC Run 2 data, corresponding to an integrated luminosity of 139 fb-1 of proton-proton collisions at s=13 TeV recorded with the ATLAS detector. The search for heavy resonances is performed over the mass range 0.2-2.5 TeV for the τ+τ-decay with at least one τ-lepton decaying into final states with hadrons. The data are in good agreement with the background prediction of the standard model. In the Mh125 scenario of the minimal supersymmetric standard model, values of tanβ>8 and tanβ>21 are excluded at the 95% confidence level for neutral Higgs boson masses of 1.0 and 1.5 TeV, respectively, where tanβ is the ratio of the vacuum expectation values of the two Higgs doublets.
Published: 2020

49. Search for chargino-neutralino production with mass splittings near the electroweak scale in three-lepton final states in s =13 TeV pp collisions with the ATLAS detector

Author: ATLAS Collaboration, Álvarez Piqueras, D., Aparisi Pozo, J.A., Cabrera, Susana, Castillo, F.L., Castillo Mª Victoria, Cerda Alberich, L., Costa, María José, Escobar, Carlos, Estrada, Oscar, Ferrer, Antonio, Fiorini, L., Fuster, Juan, Fullana, Esteban, García García, Carmen, García Navarro, José Enrique, González de la Hoz, Santiago, Guerrero Rojas, J.G.R., Gonzalvo Rodríguez, Galo Rafael, Lacasta Llácer, Carlos, Higón, Emilio, Madaffari, Daniele, Mamuzic, Judita, Martí García, Salvador, Melini, Davide, Mitsou, Vasiliki A., Bailey, A.J., Miñano Moya, M., Rodriguez Rodriguez, D., Rodriguez Bosca, S., Ruiz Martínez, Arantxa, Salt, José, Santra, A, Soldevila, Urmila, Sánchez Martínez, Javier, Valero, Alberto, Valls Ferrer, Juan Antonio, Vos, Marcel, Lozano Bahilo, José J., Ministerio de Economía y Competitividad (España), and Ministerio de Ciencia, Innovación y Universidades (España)
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: A search for supersymmetry through the pair production of electroweakinos with mass splittings near the electroweak scale and decaying via on-shell W and Z bosons is presented for a three-lepton final state. The analyzed proton-proton collision data taken at a center-of-mass energy of s=13 TeV were collected between 2015 and 2018 by the ATLAS experiment at the Large Hadron Collider, corresponding to an integrated luminosity of 139 fb-1. A search, emulating the recursive jigsaw reconstruction technique with easily reproducible laboratory-frame variables, is performed. The two excesses observed in the 2015-2016 data recursive jigsaw analysis in the low-mass three-lepton phase space are reproduced. Results with the full data set are in agreement with the Standard Model expectations. They are interpreted to set exclusion limits at the 95% confidence level on simplified models of chargino-neutralino pair production for masses up to 345 GeV.
Published: 2020

50. Measurement of soft-drop jet observables in pp collisions with the ATLAS detector at s =13 TeV

Author: ATLAS Collaboration, Aparisi Pozo, J.A., Bailey, A.J., Cabrera, Susana, Castillo, F.L., Castillo Mª Victoria, Cerda Alberich, L., Costa, María José, Escobar, Carlos, Estrada, Oscar, Ferrer, Antonio, Fiorini, L., Fuster, Juan, Fullana, Esteban, García García, Carmen, García Navarro, José Enrique, González de la Hoz, Santiago, Guerrero Rojas, J.G.R., Gonzalvo Rodríguez, Galo Rafael, Lacasta Llácer, Carlos, Higón, Emilio, Madaffari, Daniele, Mamuzic, Judita, Martí García, Salvador, Lozano Bahilo, José J., Mitsou, Vasiliki A., Moreno Llácer, María, Rodriguez Bosca, S., Rodriguez Rodriguez, D., Ruiz Martínez, Arantxa, Salt, José, Santra, A., Soldevila, Urmila, Valero, Alberto, Valls Ferrer, Juan Antonio, Vos, Marcel, Miñano Moya, M., Sánchez Martínez, Javier, Ministerio de Economía y Competitividad (España), and Ministerio de Ciencia, Innovación y Universidades (España)
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: Jet substructure quantities are measured using jets groomed with the soft-drop grooming procedure in dijet events from 32.9 fb-1 of pp collisions collected with the ATLAS detector at s=13 TeV. These observables are sensitive to a wide range of QCD phenomena. Some observables, such as the jet mass and opening angle between the two subjets which pass the soft-drop condition, can be described by a high-order (resummed) series in the strong coupling constant αS. Other observables, such as the momentum sharing between the two subjets, are nearly independent of αS. These observables can be constructed using all interacting particles or using only charged particles reconstructed in the inner tracking detectors. Track-based versions of these observables are not collinear safe, but are measured more precisely, and universal nonperturbative functions can absorb the collinear singularities. The unfolded data are directly compared with QCD calculations and hadron-level Monte Carlo simulations. The measurements are performed in different pseudorapidity regions, which are then used to extract quark and gluon jet shapes using the predicted quark and gluon fractions in each region. All of the parton shower and analytical calculations provide an excellent description of the data in most regions of phase space.
Published: 2020

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