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14 results on '"Guaraldo, Carlo"'

1. Silicon Drift Detectors spectroscopic response during the SIDDHARTA-2 Kaonic Helium run at the DA{\Phi}NE collider

Author

Miliucci, Marco, Bazzi, Massimiliano, Bosnar, Damir, Bragadireanu, Mario, Carminati, Marco, Cargnelli, Michael, Clozza, Alberto, Curceanu, Catalina, Deda, Griseld, De Paolis, Luca, Del Grande, Raffaele, Fiorini, Carlo, Guaraldo, Carlo, Iliescu, Mihail, Iwasaki, Masahiko, King, Pietro, Sandri, Paolo Levi, Marton, Johann, Moskal, Paweł, Napolitano, Fabrizio, Niedźwiecki, Szymon, Piscicchia, Kristian, Scordo, Alessandro, Sgaramella, Francesco, Shi, Hexi, Silarski, Michał, Sirghi, Diana, Sirghi, Florin, Skurzok, Magdalena, Spallone, Antonio, Tüchler, Marlene, Doce, Oton Vazquez, and Zmeskal, Johann

Subjects
Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, Nuclear Theory, Physics::Atomic Physics, Nuclear Experiment
Abstract

A large-area Silicon Drift Detectors (SDDs) system has been developed by the SIDDHARTA2 collaboration for high precision light kaonic atoms X-ray spectroscopy at the DA{\Phi}NE collider of Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali di Frascati. The SDDs geometry and electric field configuration, combined with their read-out electronics, make these devices suitable to perform high precision light kaonic atoms spectroscopy measurements in the high background of the DA{\Phi}NE collider. This work presents the spectroscopic response of the SDDs system during the kaonic helium first exotic atoms run of SIDDHARTA-2, preliminary to the kaonic deuterium data taking campaign, Comment: submitted to Condensed Matter (MDPI) for special issue "High Precision X-ray Measurements 2021"

Published
2021

2. Silicon Drift Detectors spectroscopic response during the SIDDHARTA-2 Kaonic Helium run at the DA��NE collider

Author

Miliucci, Marco, Bazzi, Massimiliano, Bosnar, Damir, Bragadireanu, Mario, Carminati, Marco, Cargnelli, Michael, Clozza, Alberto, Curceanu, Catalina, Deda, Griseld, De Paolis, Luca, Del Grande, Raffaele, Fiorini, Carlo, Guaraldo, Carlo, Iliescu, Mihail, Iwasaki, Masahiko, King, Pietro, Sandri, Paolo Levi, Marton, Johann, Moskal, Pawe��, Napolitano, Fabrizio, Nied��wiecki, Szymon, Piscicchia, Kristian, Scordo, Alessandro, Sgaramella, Francesco, Shi, Hexi, Silarski, Micha��, Sirghi, Diana, Sirghi, Florin, Skurzok, Magdalena, Spallone, Antonio, T��chler, Marlene, Doce, Oton Vazquez, and Zmeskal, Johann

Subjects
FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det)
Abstract

A large-area Silicon Drift Detectors (SDDs) system has been developed by the SIDDHARTA2 collaboration for high precision light kaonic atoms X-ray spectroscopy at the DA��NE collider of Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali di Frascati. The SDDs geometry and electric field configuration, combined with their read-out electronics, make these devices suitable to perform high precision light kaonic atoms spectroscopy measurements in the high background of the DA��NE collider. This work presents the spectroscopic response of the SDDs system during the kaonic helium first exotic atoms run of SIDDHARTA-2, preliminary to the kaonic deuterium data taking campaign, submitted to Condensed Matter (MDPI) for special issue "High Precision X-ray Measurements 2021"

Published
2021
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3. Kaonic Atoms to Investigate Global Symmetry Breaking

Author

Curceanu, Catalina, Guaraldo, Carlo, Sirghi, Diana, Amirkhani, Aidin, Baniahmad, Ata, Bazzi, Massimiliano, Bellotti, Giovanni, Bosnar, Damir, Bragadireanu, Mario, Cargnelli, Michael, Carminati, Marco, Clozza, Alberto, Paolis, Luca De, Grande, Raffaele Del, Fiorini, Carlo, Iliescu, Mihail, Iwasaki, Masahiko, King, Pietro, Sandri, Paolo Levi, Marton, Johann, Miliucci, Marco, Moskal, Paweł, Niedźwiecki, Szymon, Okada, Shinji, Piscicchia, Kristian, Scordo, Alessandro, Silarski, Michał, Sirghi, Florin, Skurzok, Magdalena, Spallone, Antonio, Tüchler, Marlene, Utica, Gianlorenzo, Doce, Oton Vazquez, and Zmeskal, Johann

Subjects
High Energy Physics::Lattice, lcsh:Mathematics, High Energy Physics::Phenomenology, Nuclear Theory, sigma terms, low-energy QCD, lcsh:QA1-939, NATURAL SCIENCES. Physics, PRIRODNE ZNANOSTI. Fizika, Computer Science::Programming Languages, Physics::Atomic Physics, Nuclear Experiment, kaonic atoms
Abstract

Kaonic atoms measure the antikaon-nucleus interaction at almost zero relative energy, allowing one to determine basic low-energy quantum chromodynamics (QCD) quantities, namely, the antikaon-nucleon ( K &macr, N) scattering lengths. The latter are important for extracting the sigma terms which are built on the symmetry breaking part of the Hamiltonian, thereby providing a measure of chiral and SU(3) symmetries breaking. After discussing the sigma terms and their relations to the kaonic atoms, we describe the most precise measurement in the literature of kaonic hydrogen, performed at LNF-INFN by the SIDDHARTA experiment. Kaonic deuterium is still to be measured, and two experiments are planned. The first, SIDDHARTA-2 at LNF-INFN was installed on DA &Phi, NE in spring 2019 and will collect data in 2020. The second, E57 at J-PARC, will become operative in 2021.

Published
2020

4. VIP-2 —High-Sensitivity Tests on the Pauli Exclusion Principle for Electrons

Author

Piscicchia, Kristian, Marton, Johann, Bartalucci, Sergio, Bazzi, Massimiliano, Bertolucci, Sergio, Bragadireanu, Mario, Cargnelli, Michael, Clozza, Alberto, Del Grande, Raffaele, De Paolis, Luca, Fiorini, Carlo, Guaraldo, Carlo, Iliescu, Mihail, Laubenstein, Matthias, Miliucci, Marco, Milotti, Edoardo, Napolitano, Fabrizio, Pichler, Andreas, Scordo, Alessandro, Shi, Hexi, Sirghi, Diana Laura, Sirghi, Florin, Sperandio, Laura, Doce, Oton Vazquez, Zmeskal, Johann, and Curceanu, Catalina

Subjects
ddc
Published
2019

5. The K1.8BR spectrometer system at J-PARC

Author

Agari, Keizo, Ajimura, Shuhei, Beer, George, Bhang, Hyoungchan, Bragadireanu, Mario, Buehler, Paul, Busso, Luigi, Cargnelli, Michael, Choi, Seonho, Curceanu, Catalina, Enomoto, Shun, Faso, Diego, Fujioka, Hiroyuki, Fujiwara, Yuya, Fukuda, Tomokazu, Guaraldo, Carlo, Hashimoto, Tadashi, Hayano, Ryugo S., Hiraiwa, Toshihiko, Hirose, Erina, Ieiri, Masaharu, Iio, Masami, Iliescu, Mihai, Inoue, Kentaro, Ishiguro, Yosuke, Ishikawa, Takashi, Ishimoto, Shigeru, Ishiwatari, Tomoichi, Itahashi, Kenta, Iwai, Masaaki, Iwasaki, Masahiko, Kakiguchi, Yutaka, Katoh, Yohji, Kawasaki, Shingo, Kienle, Paul, Kou, Hiroshi, Ma, Yue, Marton, Johann, Matsuda, Yasuyuki, Minakawa, Michifumi, Mizoi, Yutaka, Morra, Ombretta, Muto, Ryotaro, Nagae, Tomofumi, Naruki, Megumi, Noumi, Hiroyuki, Ohnishi, Hiroaki, Okada, Shinji, Outa, Haruhiko, Piscicchia, Kristian, Lener, Marco Poli, Vidal, Antonio Romero, Sada, Yuta, Sakaguchi, Atsushi, Sakuma, Fuminori, Sato, Masaharu, Sato, Yoshinori, Sawada, Shin'ya, Scordo, Alessandro, Sekimoto, Michiko, Shi, Hexi, Shirakabe, Yoshihisa, Sirghi, Diana, Sirghi, Florin, Suzuki, Ken, Suzuki, Shoji, Suzuki, Takatoshi, Suzuki, Yoshihiro, Takahashi, Hitoshi, Tanaka, Kazuhiro, Tanaka, Nobuaki, Tatsuno, Hideyuki, Tokuda, Makoto, Toyoda, Akihisa, Tomono, Dai, Tsukada, Kyo, Doce, Oton Vazquez, Watanabe, Hiroaki, Widmann, Eberhard, Wunschek, Barbara K., Yamanoi, Yutaka, Yamazaki, Toshimitsu, Yim, Heejoong, and Zmeskal, Johann

Subjects
Physics, Physics - Instrumentation and Detectors, Spectrometer, 010308 nuclear & particles physics, Liquid helium, Bar (music), Physics::Instrumentation and Detectors, Detector, FOS: Physical sciences, General Physics and Astronomy, Instrumentation and Detectors (physics.ins-det), 01 natural sciences, law.invention, Semiconductor detector, Nuclear physics, Beamline, law, 0103 physical sciences, Neutron, High Energy Physics::Experiment, J-PARC, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment
Abstract

A new spectrometer system was designed and constructed at the secondary beam line K1.8BR in the hadron hall of J-PARC to investigate $\bar K N$ interactions and $\bar K$-nuclear bound systems. The spectrometer consists of a high precision beam line spectrometer, a liquid $^3$He/$^4$He/D$_2$ target system, a Cylindrical Detector System that surrounds the target to detect the decay particles from the target region, and a neutron time-of-flight counter array located $\sim$15 m downstream from the target position. Details of the design, construction, and performance of the detector components are described., 33 pages, 25 figures

Published
2012

7. High Precision Test of the Pauli Exclusion Principle for Electrons

Author

Matthias Laubenstein, M. Iliescu, Laura Sperandio, Johann Marton, Hexi Shi, Sergio Bartalucci, Michael Cargnelli, A. Pichler, Marco Miliucci, J. P. Egger, Dorel Pietreanu, Alberto Clozza, Diana Sirghi, Carlo Fiorini, Kristian Piscicchia, Florin Sirghi, Sergio Bertolucci, Raffaele Del Grande, Massimiliano Bazzi, Mario Bragadireanu, Alessandro Scordo, Luca De Paolis, Oton Vazquez Doce, Johann Zmeskal, Catalina Curceanu, A. Amirkhani, C. Guaraldo, Edoardo Milotti, Piscicchia, Kristian, Amirkhani, Aidin, Bartalucci, Sergio, Bertolucci, Sergio, Bazzi, Massimiliano, Bragadireanu, Mario, Cargnelli, Michael, Clozza, Alberto, Curceanu, Catalina, Del Grande, Raffaele, De Paolis, Luca, Egger, Jean-Pierre, Fiorini, Carlo, Guaraldo, Carlo, Iliescu, Mihail, Laubenstein, Matthia, Marton, Johann, Miliucci, Marco, Milotti, Edoardo, Pichler, Andrea, Pietreanu, Dorel, Scordo, Alessandro, Shi, Hexi, Sirghi, Diana Laura, Sirghi, Florin, Sperandio, Laura, Doce, Oton Vazquez, and Zmeskal, Johann

Subjects
quantum foundation, Particle physics, 02 engineering and technology, Electron, 01 natural sciences, 010305 fluids & plasmas, Pauli exclusion principle, symbols.namesake, Radiation emission, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Limit (mathematics), Physics, Condensed Matter Physics, lcsh:QC1-999, quantum foundations, Electronic, Optical and Magnetic Materials, underground experiment, symbols, X-ray spectroscopy, 020201 artificial intelligence & image processing, Continuous current, Order of magnitude, lcsh:Physics
Abstract

The VIP-2 experiment aims to perform high precision tests of the Pauli Exclusion Principle for electrons. The method consists in circulating a continuous current in a copper strip, searching for the X radiation emission due to a prohibited transition (from the 2p level to the 1s level of copper when this is already occupied by two electrons). VIP already set the best limit on the PEP violation probability for electrons 1 2 &beta, 2 &lt, 4.7 &times, 10 &minus, 29 , the goal of the upgraded VIP-2 (VIolation of the Pauli Exclusion Principle-2) experiment is to improve this result of two orders of magnitude at least. The experimental apparatus and the results of the analysis of a first set of collected data will be presented.

Published
2019
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8. On the Importance of Electron Diffusion in a Bulk-Matter Test of the Pauli Exclusion Principle

Author

Hexi Shi, M. Cargnelli, Luca De Paolis, K. Piscicchia, Alberto Clozza, Sergio Bartalucci, Marco Miliucci, Florin Sirghi, J. P. Egger, Matthias Laubenstein, Edoardo Milotti, D. Pietreanu, Johann Zmeskal, A. Pichler, Oton Vazquez Doce, Sergio Bertolucci, Laura Sperandio, Alessandro Scordo, Eberhard Widmann, Diana Sirghi, M. Iliescu, C. Guaraldo, Catalina Curceanu, J. Marton, Mario Bragadireanu, Massimiliano Bazzi, Milotti, Edoardo, Bartalucci, Sergio, Bertolucci, Sergio, Bazzi, Massimiliano, Bragadireanu, Mario, Cargnelli, Michael, Clozza, Alberto, Curceanu, Catalina, De Paolis, Luca, Egger, Jean-Pierre, Guaraldo, Carlo, Iliescu, Mihail, Laubenstein, Matthia, Marton, Johann, Miliucci, Marco, Pichler, Andrea, Pietreanu, Dorel, Piscicchia, Kristian, Scordo, Alessandro, Shi, Hexi, Sirghi, Diana, Sirghi, Florin, Sperandio, Laura, Vázquez Doce, Oton, Widmann, Eberhard, and Zmeskal, Johann

Subjects
General Physics and Astronomy, lcsh:Astrophysics, Electron, 01 natural sciences, Article, X-ray, Pauli exclusion principle, symbols.namesake, Quantum mechanics, lcsh:QB460-466, 0103 physical sciences, Atom, X-rays, lcsh:Science, 010306 general physics, Wave function, Physics, diffusion processes, fundamental symmetries, 010308 nuclear & particles physics, Thermal conduction, Random walk, lcsh:QC1-999, Symmetry (physics), symbols, lcsh:Q, diffusion processe, Ground state, lcsh:Physics
Abstract

The VIolation of Pauli (VIP) experiment (and its upgraded version, VIP-2) uses the Ramberg and Snow (RS) method (Phys. Lett. B 1990, 238, 438) to search for violations of the Pauli exclusion principle in the Gran Sasso underground laboratory. The RS method consists of feeding a copper conductor with a high direct current, so that the large number of newly-injected conduction electrons can interact with the copper atoms and possibly cascade electromagnetically to an already occupied atomic ground state if their wavefunction has the wrong symmetry with respect to the atomic electrons, emitting characteristic X-rays as they do so. In their original data analysis, RS considered a very simple path for each electron, which is sure to return a bound, albeit a very weak one, because it ignores the meandering random walks of the electrons as they move from the entrance to the exit of the copper sample. These complex walks bring the electrons close to many more atoms than in the RS calculation. Here, we consider the full description of these walks and show that this leads to a nontrivial and nonlinear X-ray emission rate. Finally, we obtain an improved bound, which sets much tighter constraints on the violation of the Pauli exclusion principle for electrons.

Published
2018

9. Test of the Pauli Exclusion Principle in the VIP-2 Underground Experiment

Author

Mario Bragadireanu, Diana Sirghi, Massimiliano Bazzi, Florin Sirghi, Johann Zmeskal, Marco Miliucci, Luca De Paolis, Sergio Di Matteo, C. Guaraldo, Edoardo Milotti, Oton Vazquez Doce, Kristian Piscicchia, Matthias Laubenstein, Dorel Pietreanu, Alberto Clozza, Eberhard Widmann, Laura Sperandio, Alessandro Scordo, M. Iliescu, Sergio Bertolucci, Johann Marton, Michael Cargnelli, A. Pichler, J. P. Egger, Hexi Shi, Sergio Bartalucci, Catalina Curceanu, Carolina Berucci, Laboratori Nazionali di Frascati dell’INFN, Istituto Nazionale di Fisica Nucleare (INFN), Institut de Physique de Rennes (IPR), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS), Austrian Science Foundation (FWF) [P25529-N20], EU COST Action [CA15220], Centro Fermi (' Problemi aperti nella meccania quantistica' project), John Templeton Foundation [58158], Curceanu, Catalina, Shi, Hexi, Bartalucci, Sergio, Bertolucci, Sergio, Bazzi, Massimiliano, Berucci, Carolina, Bragadireanu, Mario, Cargnelli, Michael, Clozza, Alberto, De Paolis, Luca, Di Matteo, Sergio, Egger, Jean Pierre, Guaraldo, Carlo, Iliescu, Mihail, Marton, Johann, Laubenstein, Matthia, Milotti, Edoardo, Miliucci, Marco, Pichler, Andrea, Pietreanu, Dorel, Piscicchia, Kristian, Scordo, Alessandro, Sirghi, Diana, Sirghi, Florin, Sperandio, Laura, Vazquez Doce, Oton, Widmann, Eberhard, Zmeskal, Johann, and Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS)

Subjects
quantum foundation, Particle physics, Physics - Instrumentation and Detectors, FOS: Physical sciences, General Physics and Astronomy, Electron, x-ray spectroscopy, 01 natural sciences, Pauli exclusion principle, symbols.namesake, silicon drift detector, 0103 physical sciences, Limit (mathematics), 010306 general physics, Quantum, Physics, [PHYS]Physics [physics], Quantum Physics, 010308 nuclear & particles physics, Instrumentation and Detectors (physics.ins-det), quantum foundations, X-ray spectroscopy, underground experiment, symbols, Orbit (control theory), Quantum Physics (quant-ph), Ground state, pauli exclusion principle
Abstract

The validity of the Pauli Exclusion Principle, a building block of Quantum Mechanics, is tested for electrons. The VIP (VIolation of Pauli exclusion principle) and its follow-up VIP-2 experiments at the Laboratori Nazionali del Gran Sasso search for x-rays from copper atomic transition that are prohibited by the Pauli Exclusion Principle. The candidate events, if they exist, originate from the transition of a $2p$ orbit electron to the ground state which is already occupied by two electrons. The present limit on the probability for Pauli Exclusion Principle violation for electrons set by the VIP experiment is 4.7 $\times$ 10 $^{-29}$. We report a first result from the VIP-2 experiment improving on the VIP limit, that solidifies the final goal to achieve a two order of magnitude gain in the long run., Comment: 6 pages, 3 figures. Submitted to journal Entropy special issue: "Quantum Information and Foundations", 2017

Published
2017

10. The X-ray machine for the examination of quantum mechanics

Author

C. Guaraldo, Johann Marton, Sandro Donadi, A. Pichler, Matthias Laubenstein, Michael Cargnelli, Florin Sirghi, Carolina Berucci, M. Iliescu, Sergio Di Matteo, Alberto Clozza, Catalina Curceanu, Dorel Pietreanu, A. d'Uffizi, Oton Vazquez Doce, Sergio Bertolucci, Jean Pierre Egger, Kristian Piscicchia, Alessandro Scordo, Massimiliano Bazzi, T. Ponta, A. M. Bragadireanu, Luca De Paolis, Hexi Shi, Sergio Bartalucci, Johann Zmeskal, Diana Sirghi, Edoardo Milotti, Laura Sperandio, Angelo Bassi, Laboratori Nazionali di Frascati (LNF), Istituto Nazionale di Fisica Nucleare (INFN), Horia Hulubei National Institute of Physics and Nuclear Engineering (NIPNE), IFIN-HH, Enrico Fermi Center for Study and Research | Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi, Dipartimento di Fisica [Trieste], Università degli studi di Trieste = University of Trieste, Stefan Meyer Institut für subatomare Physik (SMI), Institut de Physique de Rennes (IPR), Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS), Université de Neuchâtel (UNINE), Laboratori Nazionali del Gran Sasso (LNGS), National Institut for Nuclear Physics and Engineering (IFIN HH), National Institut for Nuclear Physics and Engineering, Centro Studi e Ricerche 'Enrico Fermi' (Centro Fermi), Centro Studi e Ricerche e Museo Storico Della Fisica, Università degli studi di Trieste, Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS), Curceanu, Catalina, Bartalucci, Sergio, Bassi, Angelo, Bazzi, Massimiliano, Bertolucci, Sergio, Berucci, Carolina, Bragadireanu, Alexandru Mario, Cargnelli, Michael, Clozza, Alberto, De Paolis, Luca, Di Matteo, Sergio, Donadi, Sandro, D'Uffizi, Alessandro, Egger, Jean Pierre, Guaraldo, Carlo, Iliescu, Mihail, Laubenstein, Matthia, Marton, Johann, Milotti, Edoardo, Pichler, Andrea, Pietreanu, Dorel, Piscicchia, Kristian, Ponta, Titu, Scordo, Alessandro, Shi, Hexi, Sirghi, Diana, Sirghi, Florin, Sperandio, Laura, Doce, Oton Vazquez, and Zmeskal, Johann

Subjects
[PHYS]Physics [physics], Physics, Physics and Astronomy (miscellaneous), Spin-statistic, 010308 nuclear & particles physics, collapse models, 01 natural sciences, Signature (logic), X-ray, Spin-statistics, X-rays, symbols.namesake, Pauli exclusion principle, Quantum mechanics, 0103 physical sciences, symbols, Underground laboratory, collapse model, 010306 general physics, Wave function collapse, Order of magnitude
Abstract

International audience; By performing X-rays measurements in the underground laboratory of Gran Sasso, LNGS-INFN, we test a basic principle of quantum mechanics: the Pauli exclusion principle (PEP). In the future, we aim to use a similar experimental technique to search for X-rays as a signature of the spontaneous collapse of the wave function predicted by continuous spontaneous localization theories. We present the achieved results of the VIP experiment and the future plans to gain two orders of magnitude in testing PEP with the recently VIP2 setup installed at Gran Sasso. © 2016 World Scientific Publishing Company.

Published
2016

11. Hunting the 'impossible atoms' Pauli exclusion principle violation and spontaneous collapse of the wave function at test

Author

Hexi Shi, A. d'Uffizi, Johann Zmeskal, J.-P. Egger, Kristian Piscicchia, M. Iliescu, T. Ponta, Johann Marton, Angelo Bassi, T. Ishiwatari, C. Guaraldo, A. M. Bragadireanu, Oton Vazquez Doce, Alessandro Scordo, Diana Sirghi, Florin Sirghi, Sergio Bartalucci, Sandro Donadi, Matthias Laubenstein, Dorel Pietreanu, Carolina Berucci, Emanuele Sbardella, Alberto Clozza, Michael Cargnelli, Catalina Curceanu, Edoardo Milotti, Sergio Bertolucci, Laura Sperandio, Sergio Di Matteo, Curceanu, Catalina, Bartalucci, Sergio, Bassi, Angelo, Bertolucci, Sergio, Berucci, Carolina, Bragadireanu, Alexandru Mario, Cargnelli, Michael, Clozza, Alberto, Di Matteo, Sergio, Donadi, Sandro, D'Uffizi, Alessandro, Egger, J. P., Guaraldo, Carlo, Iliescu, Mihail, Ishiwatari, Tomoichi, Laubenstein, Matthia, Marton, Johann, Milotti, Edoardo, Pietreanu, Dorel, Piscicchia, Kristian, Ponta, Titu, Sbardella, Emanuele, Scordo, Alessandro, Shi, Hexi, Sirghi, Diana, Sirghi, Florin, Sperandio, Laura, Doce, Oton Vazquez, and Zmeskal, Johann

Subjects
Physics, Physics and Astronomy (miscellaneous), Basis (linear algebra), media_common.quotation_subject, collapse models, Electron, Universe, Spin-statistics, collapse models, X-rays, symbols.namesake, Pauli exclusion principle, Quantum mechanics, Atom, X-rays, symbols, Physics::Accelerator Physics, High Energy Physics::Experiment, Limit (mathematics), Experimental methods, Spin-statistics, Wave function collapse, media_common
Abstract

The Pauli exclusion principle (PEP) and, more generally, the spin-statistics connection, are at the very basis of our understanding of matter, life and Universe. The PEP spurs, presently, a lively debate on its possible limits, deeply rooted in the very foundations of Quantum Mechanics. It is, therefore, extremely important to test the limits of its validity. The Violation of the PEP (VIP) experiment established the best limit on the probability that PEP is violated by electrons, using the method of searching for PEP forbidden atomic transitions in copper. We describe the experimental method, the obtained results, and plans to go beyond the actual limit by upgrading the experimental apparatus. We discuss the possibility of using a similar experimental technique to search for X-rays as a signature of the spontaneous collapse of the wave function predicted by continuous spontaneous localization (CSL) theories.

Published
2014

12. Bayesian Model Selection for Electromagnetic Kaon Production on the Nucleon

Author

L. De Cruz, Pieter Vancraeyveld, Jan Ryckebusch, D. G. Ireland, Electronics and Informatics, Physics, Wrońska, Aleksandra, Kistryn, Stanisław, Machner, Hartmut, and Guaraldo, Carlo

Subjects
model selection, Nuclear and High Energy Physics, Particle physics, POLARIZATION, Nuclear Theory, Regge phenomenology, Bayesian inference, Bayesian probability, FOS: Physical sciences, Model selection, PHYSICS, Nuclear Theory (nucl-th), 16-GEV, Tensor, Nested sampling algorithm, Coupling constant, Physics, ELECTROPRODUCTION, Astronomy and Astrophysics, HYDROGEN, Polarization (waves), Coupling (probability), Atomic and Molecular Physics, and Optics, Phase factor, Physics and Astronomy, PHOTOPRODUCTION, Nucleon
Abstract

We present the results of a Bayesian analysis of a Regge model to describe the background contribution for K+ Lambda and K+ Sigma0 photoproduction. The model is based on the exchange of K+(494) and K*+(892) trajectories in the t-channel. We utilise the Bayesian evidence Z to determine the best model variant for each channel. The Bayesian evidence integrals were calculated using the Nested Sampling algorithm. For different prior widths, we find decisive Bayesian evidence (\Delta ln Z ~ 24) for a K+ Lambda photoproduction Regge model with a positive vector coupling and a negative tensor coupling constant for the K*+(892) trajectory, and a rotating phase factor for both trajectories. Using the chi^2 minimisation method, one could not draw this conclusion from the same dataset. For the K+ Sigma0 photoproduction Regge model, on the other hand, the difference between the evidence integrals is insufficient to pinpoint one model variant., Comment: 13 pages, 4 figures

Published
2011

14. Semi-Analytical Monte Carlo Method to Simulate the Signal of the VIP-2 Experiment

Author

Edoardo Milotti, Sergio Bartalucci, Oton Vazquez Doce, Raffaele Del Grande, Laura Sperandio, Marco Miliucci, Johann Zmeskal, Johann Marton, C. Guaraldo, Hexi Shi, Florin Sirghi, Alessandro Scordo, Mario Bragadireanu, M. Iliescu, Matthias Laubenstein, Diana Sirghi, Sergio Bertolucci, Fabrizio Napolitano, Massimiliano Bazzi, Luca De Paolis, Kristian Piscicchia, Alberto Clozza, Catalina Curceanu, Michael Cargnelli, Milotti, Edoardo, Bartalucci, Sergio, Bertolucci, Sergio, Bazzi, Massimiliano, Bragadireanu, Mario, Cargnelli, Michael, Clozza, Alberto, Curceanu, Catalina, De Paolis, Luca, Del Grande, Raffaele, Guaraldo, Carlo, Iliescu, Mihail, Laubenstein, Matthia, Marton, Johann, Miliucci, Marco, Napolitano, Fabrizio, Piscicchia, Kristian, Scordo, Alessandro, Shi, Hexi, Sirghi, Diana Laura, Sirghi, Florin, Sperandio, Laura, Doce, Oton Vázquez, and Zmeskal, Johann

Subjects
Physics and Astronomy (miscellaneous), Physics::Instrumentation and Detectors, General Mathematics, Monte Carlo method, 01 natural sciences, Signal, 010305 fluids & plasmas, Pauli exclusion principle, X-ray, 0103 physical sciences, Modulation (music), X-rays, Computer Science (miscellaneous), Point (geometry), Sensitivity (control systems), 010306 general physics, Nuclear Experiment, Physics, diffusion processes, fundamental symmetries, Numerical analysis, lcsh:Mathematics, Current source, lcsh:QA1-939, Computational physics, Upgrade, Chemistry (miscellaneous), High Energy Physics::Experiment, diffusion processe
Abstract

The VIP-2 collaboration runs an apparatus in the Gran Sasso underground laboratories of the Italian Institute for Nuclear Physics (INFN) designed to search for anomalous X-rays from electron-atom interactions due to violations of the fundamental antisymmetry of multi-electron wavefunctions. The experiment implements the scheme first proposed by Ramberg and Snow, where a current source injects electrons into a metal strip (the experiment&rsquo, s target). In this paper we describe the structure of a Monte Carlo program to simulate a new upgrade of the experiment, where the anomalous X-ray emission is modulated by an arbitrary time-varying input current. A novel feature of the simulation algorithm is that the Monte Carlo program is based on a mixture of analytical and numerical methods. We report preliminary, exploratory results on the expected detection rate for different modulations of the injected current, these results are a starting point on the way to optimize the modulation scheme and indicate a large potential improvement of the detection sensitivity.

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