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1. MuCol Milestone Report No. 5: Preliminary Parameters

Author

Accettura, Carlotta, Adrian, Simon, Agarwal, Rohit, Ahdida, Claudia, Aimé, Chiara, Aksoy, Avni, Alberghi, Gian Luigi, Alden, Siobhan, Alfonso, Luca, Amapane, Nicola, Amorim, David, Andreetto, Paolo, Anulli, Fabio, Appleby, Rob, Apresyan, Artur, Asadi, Pouya, Mahmoud, Mohammed Attia, Auchmann, Bernhard, Back, John, Badea, Anthony, Bae, Kyu Jung, Bahng, E. J., Balconi, Lorenzo, Balli, Fabrice, Bandiera, Laura, Barbagallo, Carmelo, Barlow, Roger, Bartoli, Camilla, Bartosik, Nazar, Barzi, Emanuela, Batsch, Fabian, Bauce, Matteo, Begel, Michael, Berg, J. Scott, Bersani, Andrea, Bertarelli, Alessandro, Bertinelli, Francesco, Bertolin, Alessandro, Bhat, Pushpalatha, Bianchi, Clarissa, Bianco, Michele, Bishop, William, Black, Kevin, Boattini, Fulvio, Bogacz, Alex, Bonesini, Maurizio, Bordini, Bernardo, de Sousa, Patricia Borges, Bottaro, Salvatore, Bottura, Luca, Boyd, Steven, Breschi, Marco, Broggi, Francesco, Brunoldi, Matteo, Buffat, Xavier, Buonincontri, Laura, Burrows, Philip Nicholas, Burt, Graeme Campbell, Buttazzo, Dario, Caiffi, Barbara, Calatroni, Sergio, Calviani, Marco, Calzaferri, Simone, Calzolari, Daniele, Cantone, Claudio, Capdevilla, Rodolfo, Carli, Christian, Carrelli, Carlo, Casaburo, Fausto, Casarsa, Massimo, Castelli, Luca, Catanesi, Maria Gabriella, Cavallucci, Lorenzo, Cavoto, Gianluca, Celiberto, Francesco Giovanni, Celona, Luigi, Cemmi, Alessia, Ceravolo, Sergio, Cerri, Alessandro, Cerutti, Francesco, Cesarini, Gianmario, Cesarotti, Cari, Chancé, Antoine, Charitonidis, Nikolaos, Chiesa, Mauro, Chiggiato, Paolo, Ciccarella, Vittoria Ludovica, Puviani, Pietro Cioli, Colaleo, Anna, Colao, Francesco, Collamati, Francesco, Costa, Marco, Craig, Nathaniel, Curtin, David, Damerau, Heiko, Da Molin, Giacomo, D'Angelo, Laura, Dasu, Sridhara, de Blas, Jorge, De Curtis, Stefania, De Gersem, Herbert, Delahaye, Jean-Pierre, Del Moro, Tommaso, Denisov, Dmitri, Denizli, Haluk, Dermisek, Radovan, Valdor, Paula Desiré, Desponds, Charlotte, Di Luzio, Luca, Di Meco, Elisa, Diociaiuti, Eleonora, Di Petrillo, Karri Folan, Di Sarcina, Ilaria, Dorigo, Tommaso, Dreimanis, Karlis, Pree, Tristan du, Yildiz, Hatice Duran, Edgecock, Thomas, Fabbri, Siara, Fabbrichesi, Marco, Farinon, Stefania, Ferrand, Guillaume, Somoza, Jose Antonio Ferreira, Fieg, Max, Filthaut, Frank, Fox, Patrick, Franceschini, Roberto, Ximenes, Rui Franqueira, Gallinaro, Michele, Garcia-Sciveres, Maurice, Garcia-Tabares, Luis, Gargiulo, Ruben, Garion, Cedric, Garzelli, Maria Vittoria, Gast, Marco, Generoso, Lisa, Gerber, Cecilia E., Giambastiani, Luca, Gianelle, Alessio, Gianfelice-Wendt, Eliana, Gibson, Stephen, Gilardoni, Simone, Giove, Dario Augusto, Giovinco, Valentina, Giraldin, Carlo, Glioti, Alfredo, Gorzawski, Arkadiusz, Greco, Mario, Grojean, Christophe, Grudiev, Alexej, Gschwendtner, Edda, Gueli, Emanuele, Guilhaudin, Nicolas, Han, Chengcheng, Han, Tao, Hauptman, John Michael, Herndon, Matthew, Hillier, Adrian D, Hillman, Micah, Holmes, Tova Ray, Homiller, Samuel, Jana, Sudip, Jindariani, Sergo, Johannesson, Sofia, Johnson, Benjamin, Jones, Owain Rhodri, Jurj, Paul-Bogdan, Kahn, Yonatan, Kamath, Rohan, Kario, Anna, Karpov, Ivan, Kelliher, David, Kilian, Wolfgang, Kitano, Ryuichiro, Kling, Felix, Kolehmainen, Antti, Kong, K. C., Kosse, Jaap, Krintiras, Georgios, Krizka, Karol, Kumar, Nilanjana, Kvikne, Erik, Kyle, Robert, Laface, Emanuele, Lane, Kenneth, Latina, Andrea, Lechner, Anton, Lee, Junghyun, Lee, Lawrence, Lee, Seh Wook, Lefevre, Thibaut, Leonardi, Emanuele, Lerner, Giuseppe, Li, Peiran, Li, Qiang, Li, Tong, Li, Wei, Lindroos, Mats, Lipton, Ronald, Liu, Da, Liu, Miaoyuan, Liu, Zhen, Voti, Roberto Li, Lombardi, Alessandra, Lomte, Shivani, Long, Kenneth, Longo, Luigi, Lorenzo, José, Losito, Roberto, Low, Ian, Lu, Xianguo, Lucchesi, Donatella, Luo, Tianhuan, Lupato, Anna, Ma, Yang, Machida, Shinji, Madlener, Thomas, Magaletti, Lorenzo, Maggi, Marcello, Durand, Helene Mainaud, Maltoni, Fabio, Manczak, Jerzy Mikolaj, Mandurrino, Marco, Marchand, Claude, Mariani, Francesco, Marin, Stefano, Mariotto, Samuele, Martin-Haugh, Stewart, Masullo, Maria Rosaria, Mauro, Giorgio Sebastiano, Mazzolari, Andrea, Mękała, Krzysztof, Mele, Barbara, Meloni, Federico, Meng, Xiangwei, Mentink, Matthias, Métral, Elias, Miceli, Rebecca, Milas, Natalia, Mohammadi, Abdollah, Moll, Dominik, Montella, Alessandro, Morandin, Mauro, Morrone, Marco, Mulder, Tim, Musenich, Riccardo, Nardecchia, Marco, Nardi, Federico, Nenna, Felice, Neuffer, David, Newbold, David, Novelli, Daniel, Olvegård, Maja, Onel, Yasar, Orestano, Domizia, Osborne, John, Otten, Simon, Torres, Yohan Mauricio Oviedo, Paesani, Daniele, Griso, Simone Pagan, Pagani, Davide, Pal, Kincso, Palmer, Mark, Pampaloni, Alessandra, Panci, Paolo, Pani, Priscilla, Papaphilippou, Yannis, Paparella, Rocco, Paradisi, Paride, Passeri, Antonio, Pasternak, Jaroslaw, Pastrone, Nadia, Pellecchia, Antonello, Piccinini, Fulvio, Piekarz, Henryk, Pieloni, Tatiana, Plouin, Juliette, Portone, Alfredo, Potamianos, Karolos, Potdevin, Joséphine, Prestemon, Soren, Puig, Teresa, Qiang, Ji, Quettier, Lionel, Rabemananjara, Tanjona Radonirina, Radicioni, Emilio, Radogna, Raffaella, Rago, Ilaria Carmela, Ratkus, Andris, Resseguie, Elodie, Reuter, Juergen, Ribani, Pier Luigi, Riccardi, Cristina, Ricciardi, Stefania, Robens, Tania, Robert, Youri, Rogers, Chris, Rojo, Juan, Romagnoni, Marco, Ronald, Kevin, Rosser, Benjamin, Rossi, Carlo, Rossi, Lucio, Rozanov, Leo, Ruhdorfer, Maximilian, Ruiz, Richard, Saini, Saurabh, Sala, Filippo, Salierno, Claudia, Salmi, Tiina, Salvini, Paola, Salvioni, Ennio, Sammut, Nicholas, Santini, Carlo, Saputi, Alessandro, Sarra, Ivano, Scarantino, Giuseppe, Schneider-Muntau, Hans, Schulte, Daniel, Scifo, Jessica, Sen, Tanaji, Senatore, Carmine, Senol, Abdulkadir, Sertore, Daniele, Sestini, Lorenzo, Rêgo, Ricardo César Silva, Simone, Federica Maria, Skoufaris, Kyriacos, Sorbello, Gino, Sorbi, Massimo, Sorti, Stefano, Soubirou, Lisa, Spataro, David, Queiroz, Farinaldo S., Stamerra, Anna, Stapnes, Steinar, Stark, Giordon, Statera, Marco, Stechauner, Bernd Michael, Su, Shufang, Su, Wei, Sun, Xiaohu, Sytov, Alexei, Tang, Jian, Tang, Jingyu, Taylor, Rebecca, Kate, Herman Ten, Testoni, Pietro, Thiele, Leonard Sebastian, Garcia, Rogelio Tomas, Topp-Mugglestone, Max, Torims, Toms, Torre, Riccardo, Tortora, Luca, Tortora, Ludovico, Trifinopoulos, Sokratis, Udongwo, Sosoho-Abasi, Vai, Ilaria, Valente, Riccardo Umberto, van Rienen, Ursula, Van Weelderen, Rob, Vanwelde, Marion, Velev, Gueorgui, Venditti, Rosamaria, Vendrasco, Adam, Verna, Adriano, Vernassa, Gianluca, Verweij, Arjan, Verwilligen, Piet, Villamizar, Yoxara, Vittorio, Ludovico, Vitulo, Paolo, Vojskovic, Isabella, Wang, Dayong, Wang, Lian-Tao, Wang, Xing, Wendt, Manfred, Widorski, Markus, Wozniak, Mariusz, Wu, Yongcheng, Wulzer, Andrea, Xie, Keping, Yang, Yifeng, Yap, Yee Chinn, Yonehara, Katsuya, Yoo, Hwi Dong, You, Zhengyun, Zanetti, Marco, Zaza, Angela, Zhang, Liang, Zhu, Ruihu, Zlobin, Alexander, Zuliani, Davide, and Zurita, José Francisco

Subjects
Physics - Accelerator Physics
Abstract

This document is comprised of a collection of updated preliminary parameters for the key parts of the muon collider. The updated preliminary parameters follow on from the October 2023 Tentative Parameters Report. Particular attention has been given to regions of the facility that are believed to hold greater technical uncertainty in their design and that have a strong impact on the cost and power consumption of the facility. The data is collected from a collaborative spreadsheet and transferred to overleaf.

Published
2024
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2. Shining Light on the Dark Sector: Search for Axion-like Particles and Other New Physics in Photonic Final States with FASER

Author

FASER collaboration, Abraham, Roshan Mammen, Ai, Xiaocong, Anders, John, Antel, Claire, Ariga, Akitaka, Ariga, Tomoko, Atkinson, Jeremy, Bernlochner, Florian U., Bianchi, Emma, Boeckh, Tobias, Boyd, Jamie, Brenner, Lydia, Burger, Angela, Cadoux, Franck, Cardella, Roberto, Casper, David W., Cavanagh, Charlotte, Chen, Xin, Cho, Eunhyung, Chouhan, Dhruv, Coccaro, Andrea, Débieux, Stephane, D'Onofrio, Monica, Desai, Ansh, Dmitrievsky, Sergey, Dobre, Radu, Eley, Sinead, Favre, Yannick, Fellers, Deion, Feng, Jonathan L., Fenoglio, Carlo Alberto, Ferrere, Didier, Fieg, Max, Filali, Wissal, Firu, Elena, Garabaglu, Ali, Gibson, Stephen, Gonzalez-Sevilla, Sergio, Gornushkin, Yuri, Gwilliam, Carl, Hayakawa, Daiki, Holzbock, Michael, Hsu, Shih-Chieh, Hu, Zhen, Iacobucci, Giuseppe, Inada, Tomohiro, Iodice, Luca, Jakobsen, Sune, Joos, Hans, Kajomovitz, Enrique, Kawahara, Hiroaki, Keyken, Alex, Kling, Felix, Köck, Daniela, Kontaxakis, Pantelis, Kose, Umut, Kotitsa, Rafaella, Kuehn, Susanne, Kugathasan, Thanushan, Levinson, Lorne, Li, Ke, Liu, Jinfeng, Liu, Yi, Lutz, Margaret S., MacDonald, Jack, Magliocca, Chiara, Mäkelä, Toni, McCoy, Lawson, McFayden, Josh, Medina, Andrea Pizarro, Milanesio, Matteo, Moretti, Théo, Nakamura, Mitsuhiro, Nakano, Toshiyuki, Nevay, Laurie, Ohashi, Ken, Otono, Hidetoshi, Paolozzi, Lorenzo, Petersen, Brian, Preda, Titi, Prim, Markus, Queitsch-Maitland, Michaela, Rokujo, Hiroki, Rubbia, André, Sabater-Iglesias, Jorge, Sato, Osamu, Scampoli, Paola, Schmieden, Kristof, Schott, Matthias, Sfyrla, Anna, Sgalaberna, Davide, Shamim, Mansoora, Shively, Savannah, Takubo, Yosuke, Tarannum, Noshin, Theiner, Ondrej, Torrence, Eric, Martinez, Oscar Ivan Valdes, Vasina, Svetlana, Vormwald, Benedikt, Wang, Di, Wang, Yuxiao, Welch, Eli, Xu, Yue, Zahorec, Samuel, Zambito, Stefano, and Zhang, Shunliang

Subjects
High Energy Physics - Experiment
Abstract

The first FASER search for a light, long-lived particle decaying into a pair of photons is reported. The search uses LHC proton-proton collision data at $\sqrt{s}=13.6~\text{TeV}$ collected in 2022 and 2023, corresponding to an integrated luminosity of $57.7\text{fb}^{-1}$. A model with axion-like particles (ALPs) dominantly coupled to weak gauge bosons is the primary target. Signal events are characterised by high-energy deposits in the electromagnetic calorimeter and no signal in the veto scintillators. One event is observed, compared to a background expectation of $0.44 \pm 0.39$ events, which is entirely dominated by neutrino interactions. World-leading constraints on ALPs are obtained for masses up to $300~\text{MeV}$ and couplings to the Standard Model W gauge boson, $g_{aWW}$, around $10^{-4}$ GeV$^{-1}$, testing a previously unexplored region of parameter space. Other new particle models that lead to the same experimental signature, including ALPs coupled to gluons or photons, U(1)$_B$ gauge bosons, up-philic scalars, and a Type-I two-Higgs doublet model, are also considered for interpretation, and new constraints on previously viable parameter space are presented in this paper., Comment: 37 pages, 22 figures

Published
2024

3. Learning to Reconstruct Quirky Tracks

Author

Sha, Qiyu, Murnane, Daniel, Fieg, Max, Tong, Shelley, Zakharyan, Mark, Fang, Yaquan, and Whiteson, Daniel

Subjects
High Energy Physics - Experiment, High Energy Physics - Phenomenology
Abstract

Analysis of data from particle physics experiments traditionally sacrifices some sensitivity to new particles for the sake of practical computability, effectively ignoring some potentially striking signatures. However, recent advances in ML-based tracking allow for new inroads into previously inaccessible territory, such as reconstruction of tracks which do not follow helical trajectories. This paper presents a demonstration of the capacity of ML-based tracking to reconstruct the oscillating trajectories of quirks. The technique used is not specific to quirks, and opens the door to a program of searching for many kinds of non-standard tracks.

Published
2024

4. FPF@FCC: Neutrino, QCD, and BSM Physics Opportunities with Far-Forward Experiments at a 100 TeV Proton Collider

Author

Abraham, Roshan Mammen, Adhikary, Jyotismita, Feng, Jonathan L., Fieg, Max, Kling, Felix, Li, Jinmian, Pei, Junle, Rabemananjara, Tanjona R., Rojo, Juan, and Trojanowski, Sebastian

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Experiment, Nuclear Experiment
Abstract

Proton-proton collisions at energy-frontier facilities produce an intense flux of high-energy light particles, including neutrinos, in the forward direction. At the LHC, these particles are currently being studied with the far-forward experiments FASER/FASER$\nu$ and SND@LHC, while new dedicated experiments have been proposed in the context of a Forward Physics Facility (FPF) operating at the HL-LHC. Here we present a first quantitative exploration of the reach for neutrino, QCD, and BSM physics of far-forward experiments integrated within the proposed Future Circular Collider (FCC) project as part of its proton-proton collision program (FCC-hh) at $\sqrt{s} \simeq 100$ TeV. We find that $10^9$ electron/muon neutrinos and $10^7$ tau neutrinos could be detected, an increase of several orders of magnitude compared to (HL-)LHC yields. We study the impact of neutrino DIS measurements at the FPF@FCC to constrain the unpolarised and spin partonic structure of the nucleon and assess their sensitivity to nuclear dynamics down to $x \sim 10^{-9}$ with neutrinos produced in proton-lead collisions. We demonstrate that the FPF@FCC could measure the neutrino charge radius for $\nu_{e}$ and $\nu_\mu$ and reach down to five times the SM value for $\nu_\tau$. We fingerprint the BSM sensitivity of the FPF@FCC for a variety of models, including dark Higgs bosons, relaxion-type scenarios, quirks, and millicharged particles, finding that these experiments would be able to discover LLPs with masses as large as 50 GeV and couplings as small as $10^{-8}$, and quirks with masses up to 10 TeV. Our study highlights the remarkable opportunities made possible by integrating far-forward experiments into the FCC project, and it provides new motivation for the FPF at the HL-LHC as an essential precedent to optimize the forward physics experiments that will enable the FCC to achieve its full physics potential.

Published
2024

5. First Measurement of the $\nu_e$ and $\nu_\mu$ Interaction Cross Sections at the LHC with FASER's Emulsion Detector

Author

FASER Collaboration, Abraham, Roshan Mammen, Anders, John, Antel, Claire, Ariga, Akitaka, Ariga, Tomoko, Atkinson, Jeremy, Bernlochner, Florian U., Boeckh, Tobias, Boyd, Jamie, Brenner, Lydia, Burger, Angela, Cadoux, Franck, Cardella, Roberto, Casper, David W., Cavanagh, Charlotte, Chen, Xin, Coccaro, Andrea, Debieux, Stephane, D'Onofrio, Monica, Desai, Ansh, Dmitrievsky, Sergey, Eley, Sinead, Favre, Yannick, Fellers, Deion, Feng, Jonathan L., Fenoglio, Carlo Alberto, Ferrere, Didier, Fieg, Max, Filali, Wissal, Fujimori, Haruhi, Garabaglu, Ali, Gibson, Stephen, Gonzalez-Sevilla, Sergio, Gornushkin, Yuri, Gwilliam, Carl, Hayakawa, Daiki, Hsu, Shih-Chieh, Hu, Zhen, Iacobucci, Giuseppe, Inada, Tomohiro, Iodice, Luca, Jakobsen, Sune, Joos, Hans, Kajomovitz, Enrique, Kanai, Takumi, Kawahara, Hiroaki, Keyken, Alex, Kling, Felix, Kock, Daniela, Kontaxakis, Pantelis, Kose, Umut, Kotitsa, Rafaella, Kuehn, Susanne, Kugathasan, Thanushan, Lefebvre, Helena, Levinson, Lorne, Li, Ke, Liu, Jinfeng, Lutz, Margaret S., MacDonald, Jack, Magliocca, Chiara, Martinelli, Fulvio, McCoy, Lawson, McFayden, Josh, Medina, Andrea Pizarro, Milanesio, Matteo, Moretti, Theo, Munker, Magdalena, Nakamura, Mitsuhiro, Nakano, Toshiyuki, Neuhaus, Friedemann, Nevay, Laurie, Nonaka, Motoya, Okui, Kazuaki, Ohashi, Ken, Otono, Hidetoshi, Pang, Hao, Paolozzi, Lorenzo, Petersen, Brian, Prim, Markus, Queitsch-Maitland, Michaela, Rokujo, Hiroki, Ruiz-Choliz, Elisa, Rubbia, André, Sabater-Iglesias, Jorge, Sato, Osamu, Scampoli, Paola, Schmieden, Kristof, Schott, Matthias, Sfyrla, Anna, Shamim, Mansoora, Shively, Savannah, Takubo, Yosuke, Tarannum, Noshin, Theiner, Ondrej, Torrence, Eric, Vasina, Svetlana, Vormwald, Benedikt, Wang, Di, Wang, Yuxiao, Welch, Eli, Zahorec, Samuel, Zambito, Stefano, and Zhang, Shunliang

Subjects
High Energy Physics - Experiment, High Energy Physics - Phenomenology, Physics - Instrumentation and Detectors
Abstract

This paper presents the first results of the study of high-energy electron and muon neutrino charged-current interactions in the FASER$\nu$ emulsion/tungsten detector of the FASER experiment at the LHC. A subset of the FASER$\nu$ volume, which corresponds to a target mass of 128.6~kg, was exposed to neutrinos from the LHC $pp$ collisions with a centre-of-mass energy of 13.6~TeV and an integrated luminosity of 9.5 fb$^{-1}$. Applying stringent selections requiring electrons with reconstructed energy above 200~GeV, four electron neutrino interaction candidate events are observed with an expected background of $0.025^{+0.015}_{-0.010}$, leading to a statistical significance of 5.2$\sigma$. This is the first direct observation of electron neutrino interactions at a particle collider. Eight muon neutrino interaction candidate events are also detected, with an expected background of $0.22^{+0.09}_{-0.07}$, leading to a statistical significance of 5.7$\sigma$. The signal events include neutrinos with energies in the TeV range, the highest-energy electron and muon neutrinos ever detected from an artificial source. The energy-independent part of the interaction cross section per nucleon is measured over an energy range of 560--1740 GeV (520--1760 GeV) for $\nu_e$ ($\nu_{\mu}$) to be $(1.2_{-0.7}^{+0.8}) \times 10^{-38}~\mathrm{cm}^{2}\,\mathrm{GeV}^{-1}$ ($(0.5\pm0.2) \times 10^{-38}~\mathrm{cm}^{2}\,\mathrm{GeV}^{-1}$), consistent with Standard Model predictions. These are the first measurements of neutrino interaction cross sections in those energy ranges.

Published
2024
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6. Neutrino Rate Predictions for FASER

Author

FASER Collaboration, Abraham, Roshan Mammen, Anders, John, Antel, Claire, Ariga, Akitaka, Ariga, Tomoko, Atkinson, Jeremy, Bernlochner, Florian U., Boeckh, Tobias, Boyd, Jamie, Brenner, Lydia, Burger, Angela, Cadoux, Franck, Cardella, Roberto, Casper, David W., Cavanagh, Charlotte, Chen, Xin, Coccaro, Andrea, Débieux, Stephane, D'Onofrio, Monica, Desai, Ansh, Dmitrievsky, Sergey, Eley, Sinead, Favre, Yannick, Fellers, Deion, Feng, Jonathan L., Fenoglio, Carlo Alberto, Ferrere, Didier, Fieg, Max, Filali, Wissal, Gibson, Stephen, Gonzalez-Sevilla, Sergio, Gornushkin, Yuri, Gwilliam, Carl, Hayakawa, Daiki, Hsu, Shih-Chieh, Hu, Zhen, Iacobucci, Giuseppe, Inada, Tomohiro, Iodice, Luca, Jakobsen, Sune, Joos, Hans, Kajomovitz, Enrique, Kawahara, Hiroaki, Keyken, Alex, Kling, Felix, Köck, Daniela, Kontaxakis, Pantelis, Kose, Umut, Kotitsa, Rafaella, Kuehn, Susanne, Kugathasan, Thanushan, Lefebvre, Helena, Levinson, Lorne, Li, Ke, Liu, Jinfeng, Lutz, Margaret S., MacDonald, Jack, Magliocca, Chiara, Martinelli, Fulvio, McCoy, Lawson, McFayden, Josh, Medina, Andrea Pizarro, Milanesio, Matteo, Moretti, Théo, Munker, Magdalena, Nakamura, Mitsuhiro, Nakano, Toshiyuki, Neuhaus, Friedemann, Nevay, Laurie, Ohashi, Ken, Otono, Hidetoshi, Pang, Hao, Paolozzi, Lorenzo, Petersen, Brian, Prim, Markus, Queitsch-Maitland, Michaela, Rokujo, Hiroki, Ruiz-Choliz, Elisa, Rubbia, André, Sabater-Iglesias, Jorge, Sato, Osamu, Scampoli, Paola, Schmieden, Kristof, Schott, Matthias, Sfyrla, Anna, Shamim, Mansoora, Shively, Savannah, Takubo, Yosuke, Tarannum, Noshin, Theiner, Ondrej, Torrence, Eric, Vasina, Svetlana, Vormwald, Benedikt, Wang, Di, Wang, Yuxiao, Welch, Eli, Zahorec, Samuel, Zambito, Stefano, and Zhang, Shunliang

Subjects
High Energy Physics - Experiment, High Energy Physics - Phenomenology
Abstract

The Forward Search Experiment (FASER) at CERN's Large Hadron Collider (LHC) has recently directly detected the first collider neutrinos. Neutrinos play an important role in all FASER analyses, either as signal or background, and it is therefore essential to understand the neutrino event rates. In this study, we update previous simulations and present prescriptions for theoretical predictions of neutrino fluxes and cross sections, together with their associated uncertainties. With these results, we discuss the potential for possible measurements that could be carried out in the coming years with the FASER neutrino data to be collected in LHC Run 3 and Run 4., Comment: 19 pages, 10 figures

Published
2024

7. New Physics in Single Resonant Top Quarks

Author

Tong, Shelley, Corcoran, James, Fieg, Max, Fenton, Michael, and Whiteson, Daniel

Subjects
High Energy Physics - Phenomenology
Abstract

Searches for new physics in the top quark sector are of great theoretical interest, yet some powerful avenues for discovery remain unexplored. We characterize the expected statistical power of the LHC dataset to constrain the single production of heavy top partners $T$ decaying to a top quark and a photon or a top quark and a gluon. We describe an effective interaction which could generate such production, though the limits apply to a range of theoretical models. We find sensitivity to cross sections in the $10^{2}-10^{5}$ fb range, for $T$ masses between 300 and 1000 GeV, depending on decay mode.

Published
2023

8. The LHC as a Neutrino-Ion Collider

Author

Cruz-Martinez, Juan M., Fieg, Max, Giani, Tommaso, Krack, Peter, Mäkelä, Toni, Rabemananjara, Tanjona, and Rojo, Juan

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Experiment, Nuclear Experiment, Nuclear Theory
Abstract

Proton-proton collisions at the LHC generate a high-intensity collimated beam of neutrinos in the forward (beam) direction, characterised by energies of up to several TeV. The recent observation of LHC neutrinos by FASER$\nu$ and SND@LHC signals that this hitherto ignored particle beam is now available for scientific inquiry. Here we quantify the impact that neutrino deep-inelastic scattering (DIS) measurements at the LHC would have on the parton distributions (PDFs) of protons and heavy nuclei. We generate projections for DIS structure functions for FASER$\nu$ and SND@LHC at Run III, as well as for the FASER$\nu$2, AdvSND, and FLArE experiments to be hosted at the proposed Forward Physics Facility (FPF) operating concurrently with the High-Luminosity LHC (HL-LHC). We determine that up to one million electron- and muon-neutrino DIS interactions within detector acceptance can be expected by the end of the HL-LHC, covering a kinematic region in $x$ and $Q^2$ overlapping with that of the Electron-Ion Collider. Including these DIS projections into global (n)PDF analyses, specifically PDF4LHC21, NNPDF4.0, and EPPS21, reveals a significant reduction of PDF uncertainties, in particular for strangeness and the up and down valence PDFs. We show that LHC neutrino data enables improved theoretical predictions for core processes at the HL-LHC, such as Higgs and weak gauge boson production. Our analysis demonstrates that exploiting the LHC neutrino beam effectively provides CERN with a "Neutrino-Ion Collider" without requiring modifications in its accelerator infrastructure., Comment: 42 pages, 22 figures. Added detailed studies on fluxes uncertainties

Published
2023

9. Tuning Pythia for Forward Physics Experiments

Author

Fieg, Max, Kling, Felix, Schulz, Holger, and Sjöstrand, Torbjörn

Subjects
High Energy Physics - Phenomenology
Abstract

Event generators like Pythia play an important role in physics studies at the Large Hadron Collider (LHC). While they make accurate predictions in the central region, i.e. at pseudorapidities $\eta<5$, a disagreement between Pythia and measurements in the forward region, $\eta>7$, has been observed. We introduce a dedicated forward physics tune for the Pythia event generator to be used for forward physics studies at the LHC, which uses a more flexible modelling of beam remnant hadronization and is tuned to available particle spectra measured by LHCf. Furthermore, we provide an uncertainty estimate on the new tune in a data-driven way which can be used as a means of flux uncertainty for future forward physics studies. We demonstrate an application of our tune by showing the updated neutrino and dark photon spectra at the FASER experiment.

Published
2023

10. The LHC as a Neutrino-Ion Collider

Author

Cruz-Martinez, Juan M, Fieg, Max, Giani, Tommaso, Krack, Peter, Mäkelä, Toni, Rabemananjara, Tanjona R, and Rojo, Juan

Subjects
Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics, Astronomical sciences, Atomic, molecular and optical physics, Particle and high energy physics
Abstract

Abstract: Proton-proton collisions at the LHC generate a high-intensity collimated beam of neutrinos in the forward (beam) direction, characterised by energies of up to several TeV. The recent observation of LHC neutrinos by FASER$$u $$ ν and SND@LHC signifies that this previously overlooked particle beam is now available for scientific investigation. Here we quantify the impact that neutrino deep-inelastic scattering (DIS) measurements at the LHC would have on the parton distributions (PDFs) of protons and heavy nuclei. We generate projections for DIS structure functions for FASER$$u $$ ν and SND@LHC at Run III, as well as for the FASER$$u $$ ν 2, AdvSND, and FLArE experiments to be hosted at the proposed Forward Physics Facility (FPF) operating concurrently with the High-Luminosity LHC (HL-LHC). We determine that up to one million electron-neutrino and muon-neutrino DIS interactions within detector acceptance can be expected by the end of the HL-LHC, covering a kinematic region in x and $$Q^2$$ Q 2 overlapping with that of the Electron-Ion Collider. Including these DIS projections in global (n)PDF analyses, specifically PDF4LHC21, NNPDF4.0, and EPPS21, reveals a significant reduction in PDF uncertainties, in particular for strangeness and the up and down valence PDFs. We show that LHC neutrino data enable improved theoretical predictions for core processes at the HL-LHC, such as Higgs and weak gauge boson production. Our analysis demonstrates that exploiting the LHC neutrino beam effectively provides CERN with a “Neutrino-Ion Collider” without requiring modifications in its accelerator infrastructure.

Published
2024

11. Extending the Discovery Potential for Inelastic-Dipole Dark Matter with FASER

Author

Dienes, Keith R., Feng, Jonathan L., Fieg, Max, Huang, Fei, Lee, Seung J., and Thomas, Brooks

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Experiment
Abstract

Neutral particles are notoriously difficult to observe through electromagnetic interactions. As a result, they naturally elude detection in most collider detectors. In this paper, we point out that neutral particles that interact through a dipole interaction can nevertheless be detected in far-forward detectors designed to search for long-lived particles (LLPs). In contrast to previous analyses that focused on neutral particles with elastic interactions, we consider inelastic interactions. This naturally leads to LLPs, and we demonstrate that FASER (and future experiments at the Forward Physics Facility) will be able to probe substantial regions of the associated parameter space. In particular, we find that FASER is capable of probing the region of parameter space wherein thermal freeze-out gives rise to an $\mathcal{O}$(GeV) dark-matter candidate with the appropriate relic abundance, as well as regions of parameter space that are difficult to probe at fixed-target experiments. FASER and its successor experiments may therefore play a critical role in the discovery of such a dark-matter candidate., Comment: 24 pages, LaTeX, 5 figures, 1 table

Published
2023
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12. The Forward Physics Facility at the High-Luminosity LHC

Author

Feng, Jonathan L, Kling, Felix, Reno, Mary Hall, Rojo, Juan, Soldin, Dennis, Anchordoqui, Luis A, Boyd, Jamie, Ismail, Ahmed, Harland-Lang, Lucian, Kelly, Kevin J, Pandey, Vishvas, Trojanowski, Sebastian, Tsai, Yu-Dai, Alameddine, Jean-Marco, Araki, Takeshi, Ariga, Akitaka, Ariga, Tomoko, Asai, Kento, Bacchetta, Alessandro, Balazs, Kincso, Barr, Alan J, Battistin, Michele, Bian, Jianming, Bertone, Caterina, Bai, Weidong, Bakhti, Pouya, Balantekin, A Baha, Barman, Basabendu, Batell, Brian, Bauer, Martin, Bauer, Brian, Becker, Mathias, Berlin, Asher, Bertuzzo, Enrico, Bhattacharya, Atri, Bonvini, Marco, Boogert, Stewart T, Boyarsky, Alexey, Bramante, Joseph, Brdar, Vedran, Carmona, Adrian, Casper, David W, Celiberto, Francesco Giovanni, Cerutti, Francesco, Chachamis, Grigorios, Chauhan, Garv, Citron, Matthew, Copello, Emanuele, Corso, Jean-Pierre, Darmé, Luc, D’Agnolo, Raffaele Tito, Darvishi, Neda, Das, Arindam, De Lellis, Giovanni, De Roeck, Albert, de Vries, Jordy, Dembinski, Hans P, Demidov, Sergey, deNiverville, Patrick, Denton, Peter B, Deppisch, Frank F, Dev, PS Bhupal, Di Crescenzo, Antonia, Dienes, Keith R, Diwan, Milind V, Dreiner, Herbi K, Du, Yong, Dutta, Bhaskar, Duwentäster, Pit, Elie, Lucie, Ellis, Sebastian AR, Enberg, Rikard, Farzan, Yasaman, Fieg, Max, Foguel, Ana Luisa, Foldenauer, Patrick, Foroughi-Abari, Saeid, Fortin, Jean-François, Friedland, Alexander, Fuchs, Elina, Fucilla, Michael, Gallmeister, Kai, Garcia, Alfonso, Canal, Carlos A García, Garzelli, Maria Vittoria, Gauld, Rhorry, Ghosh, Sumit, Ghoshal, Anish, Gibson, Stephen, Giuli, Francesco, Gonçalves, Victor P, Gorbunov, Dmitry, Goswami, Srubabati, Grau, Silvia, Günther, Julian Y, Guzzi, Marco, Haas, Andrew, Hakulinen, Timo, Harris, Steven P, and Harz, Julia

Subjects
Forward Physics Facility, Large Hadron Collider, new particle searches, neutrinos, QCD, astroparticle physics, dark matter, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics
Abstract

High energy collisions at the High-Luminosity Large Hadron Collider (LHC) produce a large number of particles along the beam collision axis, outside of the acceptance of existing LHC experiments. The proposed Forward Physics Facility (FPF), to be located several hundred meters from the ATLAS interaction point and shielded by concrete and rock, will host a suite of experiments to probe standard model (SM) processes and search for physics beyond the standard model (BSM). In this report, we review the status of the civil engineering plans and the experiments to explore the diverse physics signals that can be uniquely probed in the forward region. FPF experiments will be sensitive to a broad range of BSM physics through searches for new particle scattering or decay signatures and deviations from SM expectations in high statistics analyses with TeV neutrinos in this low-background environment. High statistics neutrino detection will also provide valuable data for fundamental topics in perturbative and non-perturbative QCD and in weak interactions. Experiments at the FPF will enable synergies between forward particle production at the LHC and astroparticle physics to be exploited. We report here on these physics topics, on infrastructure, detector, and simulation studies, and on future directions to realize the FPF's physics potential.

Published
2023

13. The Forward Physics Facility at the High-Luminosity LHC

Author

Feng, Jonathan L., Kling, Felix, Reno, Mary Hall, Rojo, Juan, Soldin, Dennis, Anchordoqui, Luis A., Boyd, Jamie, Ismail, Ahmed, Harland-Lang, Lucian, Kelly, Kevin J., Pandey, Vishvas, Trojanowski, Sebastian, Tsai, Yu-Dai, Alameddine, Jean-Marco, Araki, Takeshi, Ariga, Akitaka, Ariga, Tomoko, Asai, Kento, Bacchetta, Alessandro, Balazs, Kincso, Barr, Alan J., Battistin, Michele, Bian, Jianming, Bertone, Caterina, Bai, Weidong, Bakhti, Pouya, Balantekin, A. Baha, Barman, Basabendu, Batell, Brian, Bauer, Martin, Bauer, Brian, Becker, Mathias, Berlin, Asher, Bertuzzo, Enrico, Bhattacharya, Atri, Bonvini, Marco, Boogert, Stewart T., Boyarsky, Alexey, Bramante, Joseph, Brdar, Vedran, Carmona, Adrian, Casper, David W., Celiberto, Francesco Giovanni, Cerutti, Francesco, Chachamis, Grigorios, Chauhan, Garv, Citron, Matthew, Copello, Emanuele, Corso, Jean-Pierre, Darmé, Luc, D'Agnolo, Raffaele Tito, Darvishi, Neda, Das, Arindam, De Lellis, Giovanni, De Roeck, Albert, de Vries, Jordy, Dembinski, Hans P., Demidov, Sergey, deNiverville, Patrick, Denton, Peter B., Deppisch, Frank F., Dev, P. S. Bhupal, Di Crescenzo, Antonia, Dienes, Keith R., Diwan, Milind V., Dreiner, Herbi K., Du, Yong, Dutta, Bhaskar, Duwentäster, Pit, Elie, Lucie, Ellis, Sebastian A. R., Enberg, Rikard, Farzan, Yasaman, Fieg, Max, Foguel, Ana Luisa, Foldenauer, Patrick, Foroughi-Abari, Saeid, Fortin, Jean-François, Friedland, Alexander, Fuchs, Elina, Fucilla, Michael, Gallmeister, Kai, Garcia, Alfonso, Canal, Carlos A. García, Garzelli, Maria Vittoria, Gauld, Rhorry, Ghosh, Sumit, Ghoshal, Anish, Gibson, Stephen, Giuli, Francesco, Gonçalves, Victor P., Gorbunov, Dmitry, Goswami, Srubabati, Grau, Silvia, Günther, Julian Y., Guzzi, Marco, Haas, Andrew, Hakulinen, Timo, Harris, Steven P., Harz, Julia, Herrera, Juan Carlos Helo, Hill, Christopher S., Hirsch, Martin, Hobbs, Timothy J., Höche, Stefan, Hryczuk, Andrzej, Huang, Fei, Inada, Tomohiro, Infantino, Angelo, Ismail, Ameen, Jacobsson, Richard, Jana, Sudip, Jeong, Yu Seon, Ježo, Tomas, Jho, Yongsoo, Jodłowski, Krzysztof, Kalashnikov, Dmitry, Kärkkäinen, Timo J., Keppel, Cynthia, Kim, Jongkuk, Klasen, Michael, Klein, Spencer R., Ko, Pyungwon, Köhler, Dominik, Komatsu, Masahiro, Kovařík, Karol, Kulkarni, Suchita, Kumar, Jason, Kumar, Karan, Kuo, Jui-Lin, Krauss, Frank, Kusina, Aleksander, Laletin, Maxim, Roux, Chiara Le, Lee, Seung J., Lee, Hye-Sung, Lefebvre, Helena, Li, Jinmian, Li, Shuailong, Li, Yichen, Liu, Wei, Liu, Zhen, Lonjon, Mickael, Lyu, Kun-Feng, Maciula, Rafal, Abraham, Roshan Mammen, Masouminia, Mohammad R., McFayden, Josh, Mikulenko, Oleksii, Mohammed, Mohammed M. A., Mohan, Kirtimaan A., Morfín, Jorge G., Mosel, Ulrich, Mosny, Martin, Muzakka, Khoirul F., Nadolsky, Pavel, Nakano, Toshiyuki, Nangia, Saurabh, Cornago, Angel Navascues, Nevay, Laurence J., Ninin, Pierre, Nocera, Emanuele R., Nomura, Takaaki, Nunes, Rui, Okada, Nobuchika, Olness, Fred, Osborne, John, Otono, Hidetoshi, Ovchynnikov, Maksym, Papa, Alessandro, Pei, Junle, Peon, Guillermo, Perez, Gilad, Pickering, Luke, Plätzer, Simon, Plestid, Ryan, Poddar, Tanmay Kumar, Rai, Mudit, Rajaee, Meshkat, Raut, Digesh, Reimitz, Peter, Resnati, Filippo, Rhode, Wolfgang, Richardson, Peter, Ritz, Adam, Rokujo, Hiroki, Roszkowski, Leszek, Ruhe, Tim, Ruiz, Richard, Sabate-Gilarte, Marta, Sandrock, Alexander, Sarcevic, Ina, Sarkar, Subir, Sato, Osamu, Scherb, Christiane, Schienbein, Ingo, Schulz, Holger, Schwaller, Pedro, Sciutto, Sergio J., Sengupta, Dipan, Shchutska, Lesya, Shimomura, Takashi, Silvetti, Federico, Sinha, Kuver, Sjöstrand, Torbjörn, Sobczyk, Jan T., Song, Huayang, Soriano, Jorge F., Soreq, Yotam, Stasto, Anna, Stuart, David, Su, Shufang, Su, Wei, Szczurek, Antoni, Tabrizi, Zahra, Takubo, Yosuke, Taoso, Marco, Thomas, Brooks, Thonet, Pierre, Tuckler, Douglas, Vera, Agustin Sabio, Vincke, Heinz, Vishnudath, K. N., Wang, Zeren Simon, Winkler, Martin W., Wu, Wenjie, Xie, Keping, Xu, Xun-Jie, You, Tevong, Yu, Ji-Young, Yu, Jiang-Hao, Zapp, Korinna, Zhang, Yongchao, Zhang, Yue, Zhou, Guanghui, and Funchal, Renata Zukanovich

Subjects
High Energy Physics - Experiment, Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Phenomenology, Physics - Instrumentation and Detectors
Abstract

High energy collisions at the High-Luminosity Large Hadron Collider (LHC) produce a large number of particles along the beam collision axis, outside of the acceptance of existing LHC experiments. The proposed Forward Physics Facility (FPF), to be located several hundred meters from the ATLAS interaction point and shielded by concrete and rock, will host a suite of experiments to probe Standard Model (SM) processes and search for physics beyond the Standard Model (BSM). In this report, we review the status of the civil engineering plans and the experiments to explore the diverse physics signals that can be uniquely probed in the forward region. FPF experiments will be sensitive to a broad range of BSM physics through searches for new particle scattering or decay signatures and deviations from SM expectations in high statistics analyses with TeV neutrinos in this low-background environment. High statistics neutrino detection will also provide valuable data for fundamental topics in perturbative and non-perturbative QCD and in weak interactions. Experiments at the FPF will enable synergies between forward particle production at the LHC and astroparticle physics to be exploited. We report here on these physics topics, on infrastructure, detector, and simulation studies, and on future directions to realize the FPF's physics potential., Comment: 429 pages, contribution to Snowmass 2021

Published
2022
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14. Hadrophilic Dark Sectors at the Forward Physics Facility

Author

Batell, Brian, Feng, Jonathan L., Fieg, Max, Ismail, Ahmed, Kling, Felix, Abraham, Roshan Mammen, and Trojanowski, Sebastian

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Experiment
Abstract

Models with light dark sector and dark matter particles motivate qualitatively new collider searches. Here we carry out a comprehensive study of hadrophilic models with U(1)$_B$ and U(1)$_{B-3L_{\tau}}$ gauge bosons coupled to light dark matter. The new mediator particles in these models couple to quarks, but have suppressed couplings to leptons, providing a useful foil to the well-studied dark photon models. We consider current bounds from accelerator and collider searches, rare anomaly-induced decays, neutrino non-standard interactions, and dark matter direct detection. Despite the many existing constraints, these models predict a range of new signatures that can be seen in current and near future experiments, including dark gauge boson decays to the hadronic final states $\pi^+ \pi^- \pi^0$, $\pi^0 \gamma$, $K^+ K^-$, and $K_S K_L$ in FASER at LHC Run 3, enhancements of $\nu_{\tau}$ scattering rates in far-forward neutrino detectors, and thermal dark matter scattering in FLArE in the HL-LHC era. These models therefore motivate an array of different experiments in the far-forward region at the LHC, as could be accommodated in the proposed Forward Physics Facility., Comment: v2: Updated to PRD version, results unchanged v3: Corrected a minor typo in Eq. 13, results unchanged

Published
2021
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15. The Forward Physics Facility: Sites, Experiments, and Physics Potential

Author

Anchordoqui, Luis A., Ariga, Akitaka, Ariga, Tomoko, Bai, Weidong, Balazs, Kincso, Batell, Brian, Boyd, Jamie, Bramante, Joseph, Campanelli, Mario, Carmona, Adrian, Celiberto, Francesco G., Chachamis, Grigorios, Citron, Matthew, De Lellis, Giovanni, De Roeck, Albert, Dembinski, Hans, Denton, Peter B., Di Crecsenzo, Antonia, Diwan, Milind V., Dougherty, Liam, Dreiner, Herbi K., Du, Yong, Enberg, Rikard, Farzan, Yasaman, Feng, Jonathan L., Fieg, Max, Foldenauer, Patrick, Foroughi-Abari, Saeid, Friedland, Alexander, Fucilla, Michael, Gall, Jonathan, Garzelli, Maria Vittoria, Giuli, Francesco, Goncalves, Victor P., Guzzi, Marco, Halzen, Francis, Helo, Juan Carlos, Hill, Christopher S., Ismail, Ahmed, Ismail, Ameen, Jacobsson, Richard, Jana, Sudip, Jeong, Yu Seon, Jodlowski, Krzysztof, Kelly, Kevin J., Kling, Felix, Kumar, Fnu Karan, Liu, Zhen, Maciula, Rafal, Abraham, Roshan Mammen, Manshanden, Julien, McFayden, Josh, Mohammed, Mohammed M. A., Nadolsky, Pavel M., Okada, Nobuchika, Osborne, John, Otono, Hidetoshi, Pandey, Vishvas, Papa, Alessandro, Raut, Digesh, Reno, Mary Hall, Resnati, Filippo, Ritz, Adam, Rojo, Juan, Sarcevic, Ina, Scherb, Christiane, Schulz, Holger, Schwaller, Pedro, Sengupta, Dipan, Sjöstrand, Torbjörn, Smith, Tyler B., Soldin, Dennis, Stasto, Anna, Szczurek, Antoni, Tabrizi, Zahra, Trojanowski, Sebastian, Tsai, Yu-Dai, Tuckler, Douglas, Winkler, Martin W., Xie, Keping, and Zhang, Yue

Subjects
High Energy Physics - Phenomenology, Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

The Forward Physics Facility (FPF) is a proposal to create a cavern with the space and infrastructure to support a suite of far-forward experiments at the Large Hadron Collider during the High Luminosity era. Located along the beam collision axis and shielded from the interaction point by at least 100 m of concrete and rock, the FPF will house experiments that will detect particles outside the acceptance of the existing large LHC experiments and will observe rare and exotic processes in an extremely low-background environment. In this work, we summarize the current status of plans for the FPF, including recent progress in civil engineering in identifying promising sites for the FPF and the experiments currently envisioned to realize the FPF's physics potential. We then review the many Standard Model and new physics topics that will be advanced by the FPF, including searches for long-lived particles, probes of dark matter and dark sectors, high-statistics studies of TeV neutrinos of all three flavors, aspects of perturbative and non-perturbative QCD, and high-energy astroparticle physics., Comment: revised version, accepted by Physics Reports

Published
2021
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17. The Forward Physics Facility: Sites, Experiments, and Physics Potential

Author

Anchordoqui, Luis A, Ariga, Akitaka, Ariga, Tomoko, Bai, Weidong, Balazs, Kincso, Batell, Brian, Boyd, Jamie, Bramante, Joseph, Campanelli, Mario, Carmona, Adrian, Celiberto, Francesco G, Chachamis, Grigorios, Citron, Matthew, De Lellis, Giovanni, De Roeck, Albert, Dembinski, Hans, Denton, Peter B, Di Crecsenzo, Antonia, Diwan, Milind V, Dougherty, Liam, Dreiner, Herbi K, Du, Yong, Enberg, Rikard, Farzan, Yasaman, Feng, Jonathan L, Fieg, Max, Foldenauer, Patrick, Foroughi-Abari, Saeid, Friedland, Alexander, Fucilla, Michael, Gall, Jonathan, Garzelli, Maria Vittoria, Giuli, Francesco, Goncalves, Victor P, Guzzi, Marco, Halzen, Francis, Helo, Juan Carlos, Hill, Christopher S, Ismail, Ahmed, Ismail, Ameen, Jacobsson, Richard, Jana, Sudip, Jeong, Yu Seon, Jodlowski, Krzysztof, Kelly, Kevin J, Kling, Felix, Kumar, Fnu Karan, Liu, Zhen, Maciula, Rafal, Abraham, Roshan Mammen, Manshanden, Julien, McFayden, Josh, Mohammed, Mohammed MA, Nadolsky, Pavel M, Okada, Nobuchika, Osborne, John, Otono, Hidetoshi, Pandey, Vishvas, Papa, Alessandro, Raut, Digesh, Reno, Mary Hall, Resnati, Filippo, Ritz, Adam, Rojo, Juan, Sarcevic, Ina, Scherb, Christiane, Schulz, Holger, Schwaller, Pedro, Sengupta, Dipan, Sjöstrand, Torbjörn, Smith, Tyler B, Soldin, Dennis, Stasto, Anna, Szczurek, Antoni, Tabrizi, Zahra, Trojanowski, Sebastian, Tsai, Yu-Dai, Tuckler, Douglas, Winkler, Martin W, Xie, Keping, and Zhang, Yue

Subjects
hep-ph, astro-ph.CO, astro-ph.HE, hep-ex, physics.ins-det
Abstract

The Forward Physics Facility (FPF) is a proposal to create a cavern with thespace and infrastructure to support a suite of far-forward experiments at theLarge Hadron Collider during the High Luminosity era. Located along the beamcollision axis and shielded from the interaction point by at least 100 m ofconcrete and rock, the FPF will house experiments that will detect particlesoutside the acceptance of the existing large LHC experiments and will observerare and exotic processes in an extremely low-background environment. In thiswork, we summarize the current status of plans for the FPF, including recentprogress in civil engineering in identifying promising sites for the FPF andthe experiments currently envisioned to realize the FPF's physics potential. Wethen review the many Standard Model and new physics topics that will beadvanced by the FPF, including searches for long-lived particles, probes ofdark matter and dark sectors, high-statistics studies of TeV neutrinos of allthree flavors, aspects of perturbative and non-perturbative QCD, andhigh-energy astroparticle physics.

Published
2021

18. On Dark Matter Explanations of the Gamma-Ray Excesses from the Galactic Center and M31

Author

Burns, Anne-Katherine, Fieg, Max, Karwin, Christopher M., and Rajaraman, Arvind

Subjects
Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Phenomenology
Abstract

The presence of an excess gamma-ray signal toward the Galactic center (GC) has now been well established, and is known as the GC excess. Leading explanations for the signal include mis-modeling of the Galactic diffuse emission along the line of sight, an unresolved population of millisecond pulsars, and/or the annihilation of dark matter (DM). Recently, evidence for another excess gamma-ray signal has been reported toward the outer halo of M31. In this work we interpret the excess signals from both the GC and outer halo of M31 in the framework of DM annihilation, and show that the two spectra are consistent with a DM origin once J-factors are taken into account. We further compare the excesses to models of DM annihilation, and determine the corresponding best-fit parameters. We find good fits to the spectrum both in two body and four body annihilation modes.

Published
2020
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19. Dark Matter Interpretation of the Fermi-LAT Observations Toward the Outer Halo of M31

Author

Karwin, Chris, Murgia, Simona, Moskalenko, Igor, Fillingham, Sean, Burns, Anne-Katherine, and Fieg, Max

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

An excess $\gamma$-ray signal toward the outer halo of M31 has recently been reported. Although other explanations are plausible, the possibility that it arises from dark matter (DM) is valid. In this work we interpret the excess in the framework of DM annihilation, using as our representative case WIMP DM annihilating to bottom quarks, and we perform a detailed study of the systematic uncertainty in the $J$-factor for the M31 field. We find that the signal favors a DM particle with a mass of $\sim$46-73 GeV. While the mass is well constrained, the systematic uncertainty in the cross-section spans 2.5 orders of magnitude, ranging from $\sim$8$\times 10^{-27}-4 \times 10^{-24} \ \mathrm{cm^3 \ s^{-1}}$. This high uncertainty is due to two main factors, namely, an uncertainty in the substructure nature and geometry of the DM halos for both M31 and the Milky Way (MW), and correspondingly, an uncertainty in the contribution to the signal from the MW's DM halo along the line of sight. However, under the conditions that the minimum subhalo mass is $\lesssim 10^{-6} \ M_\odot$ and the actual contribution from the MW's DM halo along the line of sight is at least $\sim$30$\%$ of its total value, we show that there is a large overlap with the DM interpretations of both the Galactic center (GC) excess and the antiproton excess, while also being compatible with the limits for the MW dwarf spheroidals. More generally, we summarize the results from numerous complementary DM searches in the energy range 10 GeV $-$ 300 GeV corresponding to the GC excess and identify a region in parameter space that still remains viable for discovery of the DM particle., Comment: Submitted to Physical Review D

Published
2020
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20. Dark matter interpretation of the Fermi-LAT observations toward the outer halo of M31

Author

Karwin, Christopher M, Murgia, Simona, Moskalenko, Igor V, Fillingham, Sean P, Burns, Anne-Katherine, and Fieg, Max

Subjects
Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract

An excess γ-ray signal toward the outer halo of M31 has recently been reported. Although other explanations are plausible, the possibility that it arises from dark matter (DM) is valid. In this work we interpret the excess in the framework of DM annihilation, using as our representative case WIMP DM annihilating to bottom quarks, and we perform a detailed study of the systematic uncertainty in the J-factor for the M31 field. We find that the signal favors a DM particle with a mass of ~45-72 GeV. While the mass is well constrained, the systematic uncertainty in the cross section spans 3 orders of magnitude, ranging from ~5 × 10-27-5 × 10-24 cm3 s-1. This high uncertainty is due to two main factors, namely, an uncertainty in the substructure nature and geometry of the DM halos for both M31 and the Milky Way (MW), and correspondingly, an uncertainty in the contribution to the signal from the MW's DM halo along the line of sight. However, under the conditions that the minimum subhalo mass is ≲10-6M⊙ and the actual contribution from the MW's DM halo along the line of sight is at least ~30% of its total value, we show that there is a large overlap with the DM interpretations of both the Galactic center (GC) excess and the antiproton excess, while also being compatible with the limits for the MW dwarf spheroidals. More generally, we summarize the results from numerous complementary DM searches in the energy range 10 GeV-300 GeV corresponding to the GC excess and identify a region in parameter space that still remains viable for discovery of the DM particle.

Published
2021

21. The Forward Physics Facility: Sites, experiments, and physics potential

Author

Anchordoqui, Luis A., Ariga, Akitaka, Ariga, Tomoko, Bai, Weidong, Balazs, Kincso, Batell, Brian, Boyd, Jamie, Bramante, Joseph, Campanelli, Mario, Carmona, Adrian, Celiberto, Francesco G., Chachamis, Grigorios, Citron, Matthew, De Lellis, Giovanni, De Roeck, Albert, Dembinski, Hans, Denton, Peter B., Di Crecsenzo, Antonia, Diwan, Milind V., Dougherty, Liam, Dreiner, Herbi K., Du, Yong, Enberg, Rikard, Farzan, Yasaman, Feng, Jonathan L., Fieg, Max, Foldenauer, Patrick, Foroughi-Abari, Saeid, Friedland, Alexander, Fucilla, Michael, Gall, Jonathan, Garzelli, Maria Vittoria, Giuli, Francesco, Goncalves, Victor P., Guzzi, Marco, Halzen, Francis, Helo, Juan Carlos, Hill, Christopher S., Ismail, Ahmed, Ismail, Ameen, Jacobsson, Richard, Jana, Sudip, Jeong, Yu Seon, Jodłowski, Krzysztof, Kelly, Kevin J., Kling, Felix, Kumar, Fnu Karan, Liu, Zhen, Maciuła, Rafał, Abraham, Roshan Mammen, Manshanden, Julien, McFayden, Josh, Mohammed, Mohammed M.A., Nadolsky, Pavel M., Okada, Nobuchika, Osborne, John, Otono, Hidetoshi, Pandey, Vishvas, Papa, Alessandro, Raut, Digesh, Reno, Mary Hall, Resnati, Filippo, Ritz, Adam, Rojo, Juan, Sarcevic, Ina, Scherb, Christiane, Schulz, Holger, Schwaller, Pedro, Sengupta, Dipan, Sjöstrand, Torbjörn, Smith, Tyler B., Soldin, Dennis, Stasto, Anna, Szczurek, Antoni, Tabrizi, Zahra, Trojanowski, Sebastian, Tsai, Yu-Dai, Tuckler, Douglas, Winkler, Martin W., Xie, Keping, and Zhang, Yue

Published
2022
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27. The Forward Physics Facility: Sites, experiments, and physics potential

Author

Julien Manshanden, Jonathan Gall, Luis A. Anchordoqui, Joseph Bramante, M. V. Diwan, Richard Jacobsson, Pedro Schwaller, Matthew Citron, Douglas Tuckler, Yasaman Farzan, Max Fieg, Giovanni De Lellis, Mary Hall Reno, Vishvas Pandey, Yu-Dai Tsai, Adam Ritz, Tomoko Ariga, Krzysztof Jodłowski, Torbjörn Sjöstrand, Sudip Jana, Adrian Carmona, Kincso Balazs, Francesco Giuli, Yong Du, Dipan Sengupta, Keping Xie, Mario Campanelli, John Osborne, Kevin J. Kelly, Victor P. Goncalves, Herbi K. Dreiner, Rikard Enberg, Brian Batell, Ahmed Ismail, Juan Rojo, Maria Vittoria Garzelli, Akitaka Ariga, Patrick Foldenauer, Francis Halzen, Michael Fucilla, Alessandro Papa, Fnu Karan Kumar, Antonia Di Crecsenzo, Pavel M. Nadolsky, Holger Schulz, Zhen Liu, Jonathan L. Feng, Ameen Ismail, Filippo Resnati, Peter B. Denton, Felix Kling, Juan Carlos Helo, Weidong Bai, Grigorios Chachamis, Rafal Maciula, Yue Zhang, Hans Dembinski, Antoni Szczurek, Saeid Foroughi-Abari, Francesco Giovanni Celiberto, Mohammed M. A. Mohammed, Nobuchika Okada, Josh Mcfayden, Ina Sarcevic, Anna Stasto, Zahra Tabrizi, Digesh Raut, Liam Dougherty, Alexander Friedland, Sebastian Trojanowski, Tyler B. Smith, Christiane Scherb, Martin Wolfgang Winkler, Jamie Boyd, Marco Guzzi, Roshan Mammen Abraham, Christopher S. Hill, Hidetoshi Otono, Yu Seon Jeong, Dennis Soldin, Albert De Roeck, Anchordoqui, Luis A., Ariga, Akitaka, Ariga, Tomoko, Bai, Weidong, Balazs, Kincso, Batell, Brian, Boyd, Jamie, Bramante, Joseph, Campanelli, Mario, Carmona, Adrian, Celiberto, Francesco G., Chachamis, Grigorio, Citron, Matthew, De Lellis, Giovanni, De Roeck, Albert, Dembinski, Han, Denton, Peter B., Di Crecsenzo, Antonia, Diwan, Milind V., Dougherty, Liam, Dreiner, Herbi K., Du, Yong, Enberg, Rikard, Farzan, Yasaman, Feng, Jonathan L., Fieg, Max, Foldenauer, Patrick, Foroughi-Abari, Saeid, Friedland, Alexander, Fucilla, Michael, Gall, Jonathan, Garzelli, Maria Vittoria, Giuli, Francesco, Goncalves, Victor P., Guzzi, Marco, Halzen, Franci, Helo, Juan Carlo, Hill, Christopher S., Ismail, Ahmed, Ismail, Ameen, Jacobsson, Richard, Jana, Sudip, Jeong, Yu Seon, Jodłowski, Krzysztof, Kelly, Kevin J., Kling, Felix, Kumar, Fnu Karan, Liu, Zhen, Maciuła, Rafał, Abraham, Roshan Mammen, Manshanden, Julien, Mcfayden, Josh, Mohammed, Mohammed M. A., Nadolsky, Pavel M., Okada, Nobuchika, Osborne, John, Otono, Hidetoshi, Pandey, Vishva, Papa, Alessandro, Raut, Digesh, Reno, Mary Hall, Resnati, Filippo, Ritz, Adam, Rojo, Juan, Sarcevic, Ina, Scherb, Christiane, Schulz, Holger, Schwaller, Pedro, Sengupta, Dipan, Sjöstrand, Torbjörn, Smith, Tyler B., Soldin, Denni, Stasto, Anna, Szczurek, Antoni, Tabrizi, Zahra, Trojanowski, Sebastian, Tsai, Yu-Dai, Tuckler, Dougla, Winkler, Martin W., Xie, Keping, and Zhang, Yue

Subjects
Physics - Instrumentation and Detectors, Physics beyond the Standard Model, engineering, General Physics and Astronomy, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), long-lived [particle], site, Neutrinos interactions, particle, long-lived, New physics, Detectors and Experimental Techniques, quantum chromodynamics, nonperturbative, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Luminosity (scattering theory), Large Hadron Collider, new physics, luminosity, high, density [dark matter], Instrumentation and Detectors (physics.ins-det), primary [vertex], High Energy Physics - Phenomenology, CERN LHC Coll, vertex: primary, luminosity: high, LHC, Neutrino, Astrophysics - High Energy Astrophysical Phenomena, Particle Physics - Experiment, Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics and Astronomy, Particle physics, Cosmology and Nongalactic Astrophysics (astro-ph.CO), interpretation of experiments: CERN LHC Coll, LHC (Large Hadron Collider), high [luminosity], Dark matter, quantum chromodynamics: nonperturbative, FOS: Physical sciences, dark matter: density, dark matter, Standard Model, 3 [flavor], TeV, ddc:530, flavor: 3, Particle Physics - Phenomenology, Astroparticle physics, Interaction point, flavor, 3, Accelerators and Storage Rings, Long-lived particles, nonperturbative [quantum chromodynamics], CERN LHC Coll [interpretation of experiments], vertex, primary, particle: long-lived, Experiments, acceptance
Abstract

Acknowledgments We thank the participants of the FPF meetings and the Snowmass working groups for discussions that have contributed both directly and indirectly to this study. We gratefully acknowledge the invaluable support of the CERN Physics Beyond Colliders study group and the work of CERN technical teams related to civil engineering studies (SCE-DOD), safety discussions (HSE-OHS, HSE-RP, EP-DI-SO), integration (EN-ACE), and discussions on services (EN-CV, EN-EL, EN-AA) and simulations (SY-STI). L. A. Anchordoqui is supported by U.S. National Science Foundation (NSF) Grant PHY-2112527. A. Ariga is supported by JSPS, Japan KAKENHI Grant JP20K23373 and the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (Grant 101002690). T. Ariga acknowledges support from JSPS, Japan KAKENHI Grant JP19H01909. B. Batell is supported by U.S. Department of Energy (DOE) Grant DE–SC0007914 and by PITT PACC, USA. The work of J. Bramante is supported by NSERC, Canada. F. G. Celiberto acknowledges support from the INFN/NINPHA project, USA and thanks the Università degli Studi di Pavia, Italy for the warm hospitality. G. Chachamis is supported by the Fundação para a Ciência e a Tecnologia (Portugal) under project CERN/FIS-PAR/0024/2019 and contract ‘‘Investigador auxiliar FCT - individual Call, Portugal CEECIND/03216/2017 and acknowledges funding from the European Union’s Horizon 2020 research and innovation programme (Grant 824093). P. B. Denton is supported by DOE, USA Grant DE-SC0012704. Y. Du was supported by National Science Foundation of China (NSFC) Grants 12022514 and 11875003. The work of J. L. Feng is supported in part by NSF, USA Grants PHY- 1915005 and PHY-2111427, Simons Investigator Award, USA #376204, Simons Foundation, USA Grant 623683, and Heising-Simons Foundation, USA Grants 2019-1179 and 2020-1840. The work of M. Fieg, T. B. Smith, and Y.-D. Tsai is supported in part by NSF Grant PHY-1915005. M. Fucilla, M. M. A. Mohammed, and A. Papa acknowledge support from the INFN/QFT@COLLIDERS, Italy project. The work of M. V. Garzelli was supported in part by the Bundesministerium für Bildung und Forschung (BMBF), Germany. V. P. Goncalves was partially financed by the Brazilian funding agencies CNPq, FAPERGS, and INCT-FNA (process number 464898/2014-5). M. Guzzi is supported in part by NSF, USA Grants PHY- 1820818 and PHY-2112025. J. C. Helo acknowledges support from ANID FONDECYT-Chile Grant 1201673 and from ANID Millennium Science Initiative Program ICN2019 044. K. Jodłowski is supported by the National Science Centre, Poland, Grant 2015/18/A/ST2/00748. Ahmed Ismail and R. Mammen Abraham are supported by DOE, USA Grant DE-SC0016013. Ameen Ismail is supported by NSERC, Canada (reference number 557763) and by NSF, USA Grant PHY-2014071. Y. S. Jeong is supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT: Ministry of Science and ICT) (2021R1A2C1009296). The work of F. Kling is supported by DOE, USA Grant DE-AC02-76SF00515 and by the Deutsche Forschungsgemeinschaft under Germany’s Excellence Strategy – EXC 2121 Quantum Universe – 390833306. P. Nadolsky is supported by DOE, USA Grant DE-SC0010129. H. Otono acknowledges support from JSPS, Japan KAKENHI Grant JP20H01919. V. Pandey is supported by DOE, USA Grant DE-SC-0009824. M. H. Reno is supported in part by DOE, USA Grant DE-SC-0010113. The work of A. Ritz is supported by NSERC, Canada, Canada. The work of D. Sengupta is supported by NSF, USA Grant PHY-1915147. T. Sjöstrand is supported by Swedish Research Council Grant 2016-05996. D. Soldin acknowledges support from the NSF, USA Grant PHY-1913607. S. Trojanowski is supported by the grant ‘‘AstroCeNT: Particle Astrophysics Science and Technology Centre’’ carried out within the International Research Agendas programme of the Foundation for Polish Science financed by the European Union under the European Regional Development Fund, and by the Polish Ministry of Science and Higher Education through its scholarship for young and outstanding scientists (decision 1190/E-78/STYP/14/2019). K. Xie is supported by DOE, USA Grant DE-FG02-95ER40896, NSF, USA Grant PHY- 1820760, and in part by PITT PACC. Parts of this work have been supported by Fermi Research Alliance, LLC, USA under Contract DE-AC02-07CH11359 with the DOE., The Forward Physics Facility (FPF) is a proposal to create a cavern with the space and infrastructure to support a suite of far-forward experiments at the Large Hadron Collider during the High Luminosity era. Located along the beam collision axis and shielded from the interaction point by at least 100 m of concrete and rock, the FPF will house experiments that will detect particles outside the acceptance of the existing large LHC experiments and will observe rare and exotic processes in an extremely low-background environment. In this work, we summarize the current status of plans for the FPF, including recent progress in civil engineering in identifying promising sites for the FPF and the experiments currently envisioned to realize the FPF's physics potential. We then review the many Standard Model and new physics topics that will be advanced by the FPF, including searches for long-lived particles, probes of dark matter and dark sectors, high-statistics studies of TeV neutrinos of all three flavors, aspects of perturbative and non-perturbative QCD, and high-energy astroparticle physics., ANID FONDECYT-Chile 1201673, Fermi Research Alliance DE-AC02-07CH11359, HSE-OHS, HSE-RP, NINPHA, PITT PACC, SY-STI, National Science Foundation PHY-2112527, U.S. Department of Energy DE–SC0007914, Simons Foundation 376204, 623683, Fuel Cell Technologies Program 824093, DE-SC0012704, Horizon 2020 Framework Programme, First Peoples Fund, Heising-Simons Foundation 2019-1179, 2020-1840, Natural Sciences and Engineering Research Council of Canada, European Commission, European Research Council, Deutsche Forschungsgemeinschaft 390833306, DE-SC-0009824, DE-SC-0010113, DE-SC0010129, JP20H01919, PHY-1915147, Japan Society for the Promotion of Science JP20K23373, National Natural Science Foundation of China 11875003, 12022514, PHY-1915005, PHY-2111427, Fundação para a Ciência e a Tecnologia CERN/FIS-PAR/0024/2019, Bundesministerium für Bildung und Forschung, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Ministry of Science, ICT and Future Planning 2021R1A2C1009296, DE-AC02-76SF00515, National Research Foundation of Korea, Instituto Nazionale di Fisica Nucleare, Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul, Narodowe Centrum Nauki 2015/18/A/ST2/00748, 557763, DE-SC0016013, PHY-2014071, Vetenskapsrådet 2016-05996, PHY-1913607, Ministerstwo Edukacji i Nauki 1190/E-78/STYP/14/2019, DE-FG02-95ER40896, PHY-1820760, Università degli Studi di Pavia, Horizon 2020 101002690, JP19H01909, European Regional Development Fund, Instituto Nacional de Ciência e Tecnologia: Física Nuclear e Aplicações 464898/2014-5, PHY-1820818, PHY-2112025, Agencia Nacional de Investigación y Desarrollo ICN2019 044

Published
2022
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28. First Measurement of ν&#95;{e} and ν&#95;{μ} Interaction Cross Sections at the LHC with FASER's Emulsion Detector.

Author

Abraham RM, Anders J, Antel C, Ariga A, Ariga T, Atkinson J, Bernlochner FU, Boeckh T, Boyd J, Brenner L, Burger A, Cadoux F, Cardella R, Casper DW, Cavanagh C, Chen X, Coccaro A, Débieux S, D'Onofrio M, Desai A, Dmitrievsky S, Eley S, Favre Y, Fellers D, Feng JL, Fenoglio CA, Ferrere D, Fieg M, Filali W, Fujimori H, Garabaglu A, Gibson S, Gonzalez-Sevilla S, Gornushkin Y, Gwilliam C, Hayakawa D, Hsu SC, Hu Z, Iacobucci G, Inada T, Iodice L, Jakobsen S, Joos H, Kajomovitz E, Kanai T, Kawahara H, Keyken A, Kling F, Köck D, Kontaxakis P, Kose U, Kotitsa R, Kuehn S, Kugathasan T, Lefebvre H, Levinson L, Li K, Liu J, Lutz MS, MacDonald J, Magliocca C, Martinelli F, McCoy L, McFayden J, Medina AP, Milanesio M, Moretti T, Munker M, Nakamura M, Nakano T, Neuhaus F, Nevay L, Nonaka M, Okui K, Ohashi K, Otono H, Pang H, Paolozzi L, Petersen B, Prim M, Queitsch-Maitland M, Rokujo H, Ruiz-Choliz E, Rubbia A, Sabater-Iglesias J, Sato O, Scampoli P, Schmieden K, Schott M, Sfyrla A, Shamim M, Shively S, Takubo Y, Tarannum N, Theiner O, Torrence E, Vasina S, Vormwald B, Wang D, Wang Y, Welch E, Zahorec S, Zambito S, and Zhang S

Abstract

The first results of the study of high-energy electron neutrino (ν&#95;{e}) and muon neutrino (ν&#95;{μ}) charged-current interactions in the FASERν emulsion-tungsten detector of the FASER experiment at the LHC are presented. A 128.8 kg subset of the FASERν volume was analyzed after exposure to 9.5  fb^{-1} of sqrt[s]=13.6  TeV pp data. Four (eight) ν&#95;{e} (ν&#95;{μ}) interaction candidate events are observed with a statistical significance of 5.2σ (5.7σ). This is the first direct observation of ν&#95;{e} interactions at a particle collider and includes the highest-energy ν&#95;{e} and ν&#95;{μ} ever detected from an artificial source. The interaction cross section per nucleon σ/E&#95;{ν} is measured over an energy range of 560-1740 GeV (520-1760 GeV) for ν&#95;{e} (ν&#95;{μ}) to be (1.2&#95;{-0.7}^{+0.8})×10^{-38}  cm^{2} GeV^{-1} [(0.5±0.2)×10^{-38}  cm^{2} GeV^{-1}], consistent with standard model predictions. These are the first measurements of neutrino interaction cross sections in those energy ranges.

Published
2024
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