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1. VIP-2 with modulated current: pathfinder for enhanced Pauli exclusion principle violation studies

Author

Alessio Porcelli, Massimiliano Bazzi, Nicola Bortolotti, Mario Bragadireanu, Michael Cargnelli, Alberto Clozza, Luca De Paolis, Raffaele Del Grande, Carlo Guaraldo, Mihail Iliescu, Matthias Laubenstein, Simone Manti, Johann Marton, Marco Miliucci, Fabrizio Napolitano, Kristian Piscicchia, Alessandro Scordo, Francesco Sgaramella, Diana Laura Sirghi, Florin Sirghi, Oton Vazquez Doce, Johann Zmeskal, and Catalina Curceanu

Subjects
Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract Fermions are subject to the Pauli Exclusion Principle (PEP), which is grounded on the spin-statistics theorem and, hence, related to the very same structure of the underlying symmetries. The VIP-2 (VIolation of Pauli exclusion principle - 2) experiment has been performing extreme sensitivity tests of the PEP, up to its current and final configuration, exploiting several experimental setups designed to study different theoretical models of PEP violation, looking for a faint signal of physics Beyond the Standard Model.A current is introduced in the copper target to bring new electrons into the system and, hence, fulfill the requirements of the Messiah-Greenberg Super-Selection rule. The searched spin-statistics violating signal corresponds to X-rays emitted when the new electrons perform atomic transitions to the already filled fundamental level of copper. This work analyzes the set of the VIP-2 data corresponding to a test run of 68 days in a current modulated regime alternating no current with current data-taking in short periods (50 s each), instead the usual alternating months-long data-taking of each of these two phases. We propose an analysis method to improve the experiment’s sensitivity: a spectral analysis constraint with the Discrete Fourier Transformation of the data. Compared to the spectrum-only analysis, about a factor of 1.5 of improvement to the limit for the probability of PEP violation for electrons was obtained.

Published
2024
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2. Testing the Pauli Exclusion Principle across the Periodic Table with the VIP-3 Experiment

Author

Simone Manti, Massimiliano Bazzi, Nicola Bortolotti, Cesidio Capoccia, Michael Cargnelli, Alberto Clozza, Luca De Paolis, Carlo Fiorini, Carlo Guaraldo, Mihail Iliescu, Matthias Laubenstein, Johann Marton, Fabrizio Napolitano, Kristian Piscicchia, Alessio Porcelli, Alessandro Scordo, Francesco Sgaramella, Diana Laura Sirghi, Florin Sirghi, Oton Vazquez Doce, Johann Zmeskal, and Catalina Curceanu

Subjects
PEP, VIP-3, MCDF, Science, Astrophysics, QB460-466, Physics, QC1-999
Abstract

The Pauli exclusion principle (PEP), a cornerstone of quantum mechanics and whole science, states that in a system, two fermions can not simultaneously occupy the same quantum state. Several experimental tests have been performed to place increasingly stringent bounds on the validity of PEP. Among these, the series of VIP experiments, performed at the Gran Sasso Underground National Laboratory of INFN, is searching for PEP-violating atomic X-ray transitions in copper. In this paper, the upgraded VIP-3 setup is described, designed to extend these investigations to higher-Z elements such as zirconium, silver, palladium, and tin. We detail the enhanced design of this setup, including the implementation of cutting-edge, 1 mm thick, silicon drift detectors, which significantly improve the measurement sensitivity at higher energies. Additionally, we present calculations of expected PEP-violating energy shifts in the characteristic lines of these elements, performed using the multi-configurational Dirac–Fock method from first principles. The VIP-3 realization will contribute to ongoing research into PEP violation for different elements, offering new insights and directions for future studies.

Published
2024
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3. Optimization of a BEGe Detector Setup for Testing Quantum Foundations in the Underground LNGS Laboratory

Author

Kristian Piscicchia, Alberto Clozza, Diana Laura Sirghi, Massimiliano Bazzi, Nicola Bortolotti, Mario Bragadireanu, Michael Cargnelli, Luca De Paolis, Raffaele Del Grande, Carlo Guaraldo, Mihail Iliescu, Matthias Laubenstein, Simone Manti, Johann Marton, Marco Miliucci, Fabrizio Napolitano, Alessio Porcelli, Alessandro Scordo, Francesco Sgaramella, Florin Sirghi, Sandro Tomassini, Oton Vazquez Doce, Johann Zmeskal, and Catalina Curceanu

Subjects
X-ray spectroscopy, germanium detectors, Pauli principle violation, wave function collapse, Physics, QC1-999
Abstract

In this work, we report on tests performed with an experimental apparatus prototype based on a broad-energy germanium detector aimed at investigating topical, foundational issues in quantum mechanics: i.e., possible violations of the spin-statistics connection and models of dynamical wave function collapse. Our recent phenomenological analyses demonstrated the importance of pushing the research of new physics signal, predicted in these fields, to an energy range below 10 keV. We describe the development of the dedicated data acquisition system and of the pulse shape discrimination algorithm, which have already allowed us to get a factor two improvement in the lower energy threshold. Future plans are discussed to further improve the lower energy threshold to the level of a few keV.

Published
2024
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4. A review of the low-energy K−-nucleus/nuclei interactions with light nuclei AMADEUS investigations

Author

Magdalena Skurzok, Michael Cargnelli, Raffaele del Grande, Laura Fabbietti, Carlo Guaraldo, Johann Marton, Paweł Moskal, Kristian Piscicchia, Alessandro Scordo, Michał Silarski, Diana Laura Sirghi, Oton Vazquez Doce, Johann Zmeskal, Sławomir Wycech, Paolo Branchini, Eryk Czerwiński, Xiaolin Kang, Giuseppe Mandaglio, Matteo Martini, Andrea Selce, and Catalina Curceanu

Subjects
strangeness, kaon absorption, antikaon interactions in nuclear matter, strong interaction, cross section, Physics, QC1-999
Abstract

The AMADEUS Collaboration conducts research aimed to experimentally investigate the low-energy K− hadronic interactions with light nuclei like hydrogen, helium, and carbon, in order to provide new constraints to the antikaon-nucleon strong interaction studies in the non-perturbative quantum chromodynamics regime. K− nuclear absorption, both at-rest and in-flight, are explored using the unique low-momentum and monochromatic kaon beam from the DAΦNE collider interacting with the KLOE detector components, a detector characterized by high acceptance and excellent position and momentum resolutions. This paper presents an overview of the AMADEUS results.

Published
2023
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5. Characterization of the SIDDHARTA-2 Setup via the Kaonic Helium Measurement

Author

Francesco Sgaramella, Francesco Clozza, Leonardo Abbene, Francesco Artibani, Massimiliano Bazzi, Giacomo Borghi, Mario Bragadireanu, Antonino Buttacavoli, Michael Cargnelli, Marco Carminati, Alberto Clozza, Griseld Deda, Raffaele Del Grande, Luca De Paolis, Kamil Dulski, Carlo Fiorini, Carlo Guaraldo, Mihail Iliescu, Masahiko Iwasaki, Aleksander Khreptak, Simone Manti, Johann Marton, Marco Miliucci, Paweł Moskal, Fabrizio Napolitano, Szymon Niedźwiecki, Hiroaki Ohnishi, Kristian Piscicchia, Fabio Principato, Alessandro Scordo, Michal Silarski, Diana Sirghi, Florin Sirghi, Magdalena Skurzok, Antonio Spallone, Kairo Toho, Marlene Tüchler, Johann Zmeskal, and Catalina Curceanu

Subjects
kaonic helium, silicon drift detectors, X-rays, kaon–nucleon interaction, Physics, QC1-999
Abstract

The aim of the SIDDHARTA-2 experiment is to perform the first measurement ever of the width and shift induced by the strong interaction to the 2p→1s energy transition of kaonic deuterium. This ambitious goal implies a challenging task due to the very low X-ray yield of kaonic deuterium, which is why an accurate and thorough characterization of the experimental apparatus is mandatory before starting the data-taking campaign. Helium-4 is an excellent candidate for this characterization since it exhibits a high yield in particular for the 3d→2p transition, roughly 100 times greater than that of the kaonic deuterium. The ultimate goal of the work reported in this paper is to study the performances of the full experimental setup in view of the kaonic deuterium measurement. This is carried out by measuring the values of the shift and the width for the 3d→2p energy transition of kaonic helium-4, induced by the strong interaction. The values obtained for these quantities, for a total integrated luminosity of ∼31/pb, are ε2p=2.0±1.2(stat)±1.5(syst)eV and Γ2p=1.9±5.7(stat)±0.7(syst)eV. The results, compared to the value of the shift measured by the SIDDHARTA experiment ε2p=0±6(stat)±2(syst)eV, show a net enhancement of the resolution of the apparatus, providing strong evidence of the potential to perform the challenging measurement of the kaonic deuterium.

Published
2024
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6. Potentialities of CdZnTe Quasi-Hemispherical Detectors for Hard X-ray Spectroscopy of Kaonic Atoms at the DAΦNE Collider

Author

Leonardo Abbene, Antonino Buttacavoli, Fabio Principato, Gaetano Gerardi, Manuele Bettelli, Andrea Zappettini, Massimiliano Bazzi, Mario Bragadireanu, Michael Cargnelli, Marco Carminati, Alberto Clozza, Griseld Deda, Raffaele Del Grande, Luca De Paolis, Laura Fabbietti, Carlo Fiorini, Carlo Guaraldo, Mihail Iliescu, Misahiko Iwasaki, Aleksander Khreptak, Simone Manti, Johann Marton, Marco Miliucci, Pawel Moskal, Fabrizio Napolitano, Szymon Niedźwiecki, Hiroaky Ohnishi, Kristian Piscicchia, Yuta Sada, Francesco Sgaramella, Hexi Shi, Michalł Silarski, Diana Laura Sirghi, Florin Sirghi, Magdalena Skurzok, Antonio Spallone, Kairo Toho, Marlene Tüchler, Oton Vazquez Doce, Chihiro Yoshida, Johannes Zmeskal, Alessandro Scordo, and Catalina Curceanu

Subjects
CdZnTe detectors, quasi-hemispherical detectors, compound semiconductor detectors, hard X-ray spectroscopy, kaonic atoms, digital pulse processing electronics, Chemical technology, TP1-1185
Abstract

Kaonic atom X-ray spectroscopy is a consolidated technique for investigations on the physics of strong kaon–nucleus/nucleon interaction. Several experiments have been conducted regarding the measurement of soft X-ray emission (20 keV) from intermediate kaonic atoms (carbon, aluminum, and sulfur). In this context, we investigated cadmium–zinc–telluride (CdZnTe or CZT) detectors, which have recently demonstrated high-resolution capabilities for hard X-ray and gamma-ray detection. A demonstrator prototype based on a new cadmium–zinc–telluride quasi-hemispherical detector and custom digital pulse processing electronics was developed. The detector covered a detection area of 1 cm2 with a single readout channel and interesting room-temperature performance with energy resolution of 4.4% (2.6 keV), 3% (3.7 keV), and 1.4% (9.3 keV) FWHM at 59.5, 122.1, and 662 keV, respectively. The results from X-ray measurements at the DAΦNE collider at the INFN National Laboratories of Frascati (Italy) are also presented with particular attention to the effects and rejection of electromagnetic and hadronic background.

Published
2023
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7. First Experimental Survey of a Whole Class of Non-Commutative Quantum Gravity Models in the VIP-2 Lead Underground Experiment

Author

Kristian Piscicchia, Antonino Marcianò, Andrea Addazi, Diana Laura Sirghi, Massimiliano Bazzi, Nicola Bortolotti, Mario Bragadireanu, Michael Cargnelli, Alberto Clozza, Luca De Paolis, Raffaele Del Grande, Carlo Guaraldo, Mihail Iliescu, Matthias Laubenstein, Simone Manti, Johann Marton, Marco Miliucci, Fabrizio Napolitano, Federico Nola, Alessio Porcelli, Alessandro Scordo, Francesco Sgaramella, Florin Sirghi, Oton Vazquez Doce, Johann Zmeskal, and Catalina Curceanu

Subjects
non-commutative quantum gravity, Pauli principle violation, X-ray spectroscopy, underground experiment, Elementary particle physics, QC793-793.5
Abstract

This study is aimed to set severe constraints on a whole class of non-commutative space-times scenarios as a class of universality for several quantum gravity models. To this end, slight violations of the Pauli exclusion principle—predicted by these models—are investigated by searching for Pauli forbidden Kα and Kβ transitions in lead. The selection of a high atomic number target material allows to test the energy scale of the space-time non-commutativity emergence at high atomic transition energies. As a consequence, the measurement is very sensitive to high orders in the power series expansion of the Pauli violation probability, which allows to set the first constraint to the “triply special relativity” model proposed by Kowalski-Glikman and Smolin. The characteristic energy scale of the model is bound to Λ>5.6·10−9 Planck scales.

Published
2023
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8. Search for a remnant violation of the Pauli exclusion principle in a Roman lead target

Author

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

Subjects
Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract In this paper we report on the results of two analyses of the data taken with a dedicated VIP-Lead experiment at the Gran Sasso National Laboratory of the INFN. We use measurements taken in an environment that is especially well screened from cosmic rays, with a metal target made of “Roman lead” which is characterised by a low level of intrinsic radioactivity. The analyses lead to an improvement, on the upper bounds of the Pauli Exclusion Principle violation for electrons, which is more than one (four) orders of magnitude, when the electron-atom interactions are described in terms of scatterings (or close encounters) respectively.

Published
2020
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9. A Novel Approach to Parameter Determination of the Continuous Spontaneous Localization Collapse Model

Author

Kristian Piscicchia, Alessio Porcelli, Angelo Bassi, Massimiliano Bazzi, Mario Bragadireanu, Michael Cargnelli, Alberto Clozza, Luca De Paolis, Raffaele Del Grande, Maaneli Derakhshani, Diósi Lajos, Sandro Donadi, Carlo Guaraldo, Mihai Iliescu, Matthias Laubenstein, Simone Manti, Johann Marton, Marco Miliucci, Fabrizio Napolitano, Alessandro Scordo, Francesco Sgaramella, Diana Laura Sirghi, Florin Sirghi, Oton Vazquez Doce, Johann Zmeskal, and Catalina Curceanu

Subjects
collapse models, CSL, spontaneous radiation, germanium detectors, Science, Astrophysics, QB460-466, Physics, QC1-999
Abstract

Models of dynamical wave function collapse consistently describe the breakdown of the quantum superposition with the growing mass of the system by introducing non-linear and stochastic modifications to the standard Schrödinger dynamics. Among them, Continuous Spontaneous Localization (CSL) was extensively investigated both theoretically and experimentally. Measurable consequences of the collapse phenomenon depend on different combinations of the phenomenological parameters of the model—the strength λ and the correlation length rC—and have led, so far, to the exclusion of regions of the admissible (λ−rC) parameters space. We developed a novel approach to disentangle the λ and rC probability density functions, which discloses a more profound statistical insight.

Published
2023
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10. Underground Tests of Quantum Mechanics by the VIP Collaboration at Gran Sasso

Author

Fabrizio Napolitano, Andrea Addazi, Angelo Bassi, Massimiliano Bazzi, Mario Bragadireanu, Michael Cargnelli, Alberto Clozza, Luca De Paolis, Raffaele Del Grande, Maaneli Derakhshani, Sandro Donadi, Carlo Fiorini, Carlo Guaraldo, Mihail Iliescu, Matthias Laubenstein, Simone Manti, Antonino Marcianò, Johann Marton, Marco Miliucci, Edoardo Milotti, Kristian Piscicchia, Alessio Porcelli, Alessandro Scordo, Francesco Sgaramella, Diana Laura Sirghi, Florin Sirghi, Oton Vazquez Doce, Johann Zmeskal, and Catalina Curceanu

Subjects
wavefunction collapse, Pauli exclusion principle, X-rays, VIP-2, fundamental symmetries, Mathematics, QA1-939
Abstract

Modern physics lays its foundations on the pillars of Quantum Mechanics (QM), which has been proven successful to describe the microscopic world of atoms and particles, leading to the construction of the Standard Model. Despite the big success, the old open questions at its very heart, such as the measurement problem and the wave function collapse, are still open. Various theories consider scenarios which could encompass a departure from the predictions of the standard QM, such as extra-dimensions or deformations of the Lorentz/Poincaré symmetries. At the Italian National Gran Sasso underground Laboratory LNGS, we search for evidence of new physics proceeding from models beyond standard QM, using radiation detectors. Collapse models addressing the foundations of QM, such as the gravity-related Diósi–Penrose (DP) and Continuous Spontaneous Localization (CSL) models, predict the emission of spontaneous radiation, which allows experimental tests. Using a high-purity Germanium detector, we could exclude the natural parameterless version of the DP model and put strict bounds on the CSL one. In addition, forbidden atomic transitions could prove a possible violation of the Pauli Exclusion Principle (PEP) in open and closed systems. The VIP-2 experiment is currently in operation, aiming at detecting PEP-violating signals in Copper with electrons; the VIP-3 experiment upgrade is foreseen to become operative in the next few years. We discuss the VIP-Lead experiment on closed systems, and the strong bounds it sets on classes of non-commutative quantum gravity theories, such as the θ–Poincaré theory.

Published
2023
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11. Testing the Pauli Exclusion Principle with the VIP-2 Experiment

Author

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

Subjects
Pauli Exclusion Principle, X-rays, VIP-2, fundamental symmetries, Mathematics, QA1-939
Abstract

Violations of the Pauli Exclusion Principle (PEP), albeit small, could be motivated by physics beyond the Standard Model, ranging from violation of Lorentz invariance to extra space dimensions. This scenario can be experimentally constrained through dedicated, state-of-the-art X-ray spectroscopy, searching for a forbidden atomic transition from the L shell to the K shell already occupied by two electrons. The VIP-2 Experiment located at the underground Gran Sasso National Laboratories of INFN (Italy) tests PEP violations by introducing new electrons via a direct current in a copper conductor, measuring the X-ray energies through a silicon drift detector. Bayesian and frequentist analyses of approximately six months of data taken with the fully operational setup is presented, setting the strongest limit to date on the PEP violation shown by the VIP collaboration. The upper bound on PEP violation are placed at 90% CL β2/2≤6.8×10−42 with the Bayesian approach, and β2/2≤7.1×10−42 with the frequentist CLs technique.

Published
2022
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12. Silicon Drift Detectors’ Spectroscopic Response during the SIDDHARTA-2 Kaonic Helium Run at the DAΦNE Collider

Author

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

Subjects
X-ray precision spectroscopy, kaonic atoms, SIDDHARTA-2, Physics, QC1-999
Abstract

A large-area silicon drift detectors (SDDs) system has been developed by the SIDDHARTA-2 collaboration for high precision light kaonic atom X-ray spectroscopy at the DAΦNE 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 for performing high precision light kaonic atom spectroscopy measurements in the background of the DAΦNE collider. This work presents the spectroscopic response of the SDDs system during the first exotic atoms run of SIDDHARTA-2 with kaonic helium, a preliminary to the kaonic deuterium data taking campaign. The SIDDHARTA-2 spectroscopic system has good energy resolution and a 2 μs timing window which rejects the asynchronous events, scaling the background by a factor of 10−5. The results obtained for the first exotic atoms run of SIDDHARTA-2 prove this system to be ready to perform the challenging kaonic deuterium measurement.

Published
2021
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13. Semi-Analytical Monte Carlo Method to Simulate the Signal of the VIP-2 Experiment

Author

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

Subjects
pauli exclusion principle, X-rays, diffusion processes, fundamental symmetries, Mathematics, QA1-939
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’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.

Published
2020
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14. VIP-2 —High-Sensitivity Tests on the Pauli Exclusion Principle for Electrons

Author

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

Subjects
Pauli Principle violation, X-ray spectroscopy, underground experiment, Science, Astrophysics, QB460-466, Physics, QC1-999
Abstract

The VIP collaboration is performing high sensitivity tests of the Pauli Exclusion Principle for electrons in the extremely low cosmic background environment of the underground Gran Sasso National Laboratory INFN (Italy). In particular, the VIP-2 Open Systems experiment was conceived to put strong constraints on those Pauli Exclusion Principle violation models which respect the so-called Messiah–Greenberg superselection rule. The experimental technique consists of introducing a direct current in a copper conductor, and searching for the X-rays emission coming from a forbidden atomic transition from the L shell to the K shell of copper when the K shell is already occupied by two electrons. The analysis of the first three months of collected data (in 2018) is presented. The obtained result represents the best bound on the Pauli Exclusion Principle violation probability which fulfills the Messiah–Greenberg rule.

Published
2020
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15. Kaonic Atoms to Investigate Global Symmetry Breaking

Author

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

Subjects
kaonic atoms, sigma terms, low-energy QCD, Mathematics, QA1-939
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 ¯ 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 Φ NE in spring 2019 and will collect data in 2020. The second, E57 at J-PARC, will become operative in 2021.

Published
2020
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16. High Precision Test of the Pauli Exclusion Principle for Electrons

Author

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

Subjects
Pauli exclusion principle, quantum foundations, X-ray spectroscopy, underground experiment, Physics, QC1-999
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 β 2 < 4.7 × 10 − 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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17. X-ray Detectors for Kaonic Atoms Research at DAΦNE

Author

Catalina Curceanu, Aidin Amirkhani, Ata Baniahmad, Massimiliano Bazzi, Giovanni Bellotti, Carolina Berucci, Damir Bosnar, Mario Bragadireanu, Michael Cargnelli, Alberto Clozza, Raffaele Del Grande, Carlo Fiorini, Francesco Ghio, Carlo Guaraldo, Mihail Iliescu, Masaiko Iwasaki, Paolo Levi Sandri, Johann Marton, Marco Miliucci, Pavel Moskal, Szymon Niedźwiecki, Shinji Okada, Dorel Pietreanu, Kristian Piscicchia, Alessandro Scordo, Hexi Shi, Michal Silarski, Diana Sirghi, Florin Sirghi, Magdalena Skurzok, Antonio Spallone, Hideyuki Tatsuno, Oton Vazquez Doce, Eberhard Widmann, and Johann Zmeskal

Subjects
kaonic atoms, strong interaction, X-ray detectors, Physics, QC1-999
Abstract

This article presents the kaonic atom studies performed at the INFN National Laboratory of Frascati (Laboratori Nazionali di Frascati dell’INFN, LNF-INFN) since the opening of this field of research at the DA Φ NE collider in early 2000. Significant achievements have been obtained by the DA Φ NE Exotic Atom Research (DEAR) and Silicon Drift Detector for Hadronic Atom Research by Timing Applications (SIDDHARTA) experiments on kaonic hydrogen, which have required the development of novel X-ray detectors. The 2019 installation of the new SIDDHARTA-2 experiment to measure kaonic deuterium for the first time has been made possible by further technological advances in X-ray detection.

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

Author

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

Subjects
Pauli exclusion principle, X-rays, diffusion processes, fundamental symmetries, Science, Astrophysics, QB460-466, Physics, QC1-999
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
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19. First Experimental Survey of a Whole Class of Non-Commutative Quantum Gravity Models in the VIP-2 Lead Underground Experiment

Author

Curceanu, Kristian Piscicchia, Antonino Marcianò, Andrea Addazi, Diana Laura Sirghi, Massimiliano Bazzi, Nicola Bortolotti, Mario Bragadireanu, Michael Cargnelli, Alberto Clozza, Luca De Paolis, Raffaele Del Grande, Carlo Guaraldo, Mihail Iliescu, Matthias Laubenstein, Simone Manti, Johann Marton, Marco Miliucci, Fabrizio Napolitano, Federico Nola, Alessio Porcelli, Alessandro Scordo, Francesco Sgaramella, Florin Sirghi, Oton Vazquez Doce, Johann Zmeskal, and Catalina

Subjects
non-commutative quantum gravity, Pauli principle violation, X-ray spectroscopy, underground experiment
Abstract

This study is aimed to set severe constraints on a whole class of non-commutative space-times scenarios as a class of universality for several quantum gravity models. To this end, slight violations of the Pauli exclusion principle—predicted by these models—are investigated by searching for Pauli forbidden Kα and Kβ transitions in lead. The selection of a high atomic number target material allows to test the energy scale of the space-time non-commutativity emergence at high atomic transition energies. As a consequence, the measurement is very sensitive to high orders in the power series expansion of the Pauli violation probability, which allows to set the first constraint to the “triply special relativity” model proposed by Kowalski-Glikman and Smolin. The characteristic energy scale of the model is bound to Λ>5.6·10−9 Planck scales.

Published
2023
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20. Collapse models under test by high sensitivity γ-ray and X-ray measurements

Author

Catalina Curceanu, Kristian Piscicchia, Massimiliano Bazzi, Mario Bragadireanu, Michael Cargnelli, Alberto Clozza, Luca De Paolis, Raffaele Del Grande, Carlo Guaraldo, Mihail Iliescu, Matthias Laubenstein, Johann Marton, Marco Miliucci, Fabrizio Napolitano, Alessio Porcelli, Alessandro Scordo, Francesco Sgarmella, Hexi Shi, Diana Laura Sirghi, Florin Sirghi, Oton Vazquez Doce, and Johann Zmeskal

Published
2023

21. Experimental test of noncommutative quantum gravity by VIP-2 Lead

Author

Kristian Piscicchia, Andrea Addazi, Antonino Marcianò, Massimiliano Bazzi, Michael Cargnelli, Alberto Clozza, Luca De Paolis, Raffaele Del Grande, Carlo Guaraldo, Mihail Antoniu Iliescu, Matthias Laubenstein, Johann Marton, Marco Miliucci, Fabrizio Napolitano, Alessio Porcelli, Alessandro Scordo, Diana Laura Sirghi, Florin Sirghi, Oton Vazquez Doce, Johann Zmeskal, and Catalina Curceanu

Subjects
High Energy Physics - Theory, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), High Energy Physics - Theory (hep-th), FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), General Relativity and Quantum Cosmology, High Energy Physics - Experiment
Abstract

Pauli Exclusion Principle (PEP) violations induced by space-time non-commutativity, a class of universality for several models of Quantum Gravity, are investigated by the VIP-2 Lead experiment at the Gran Sasso underground National Laboratory of INFN. The VIP-2 Lead experimental bound on the non-commutative space-time scale $\Lambda$ excludes $\theta$-Poincar\'e far above the Planck scale for non vanishing ``electric-like" components of $\theta_{\mu \nu}$, and up to $6.9 \cdot 10^{-2}$ Planck scales if they are null. Therefore, this new bound represents the tightest one so far provided by atomic transitions tests. This result strongly motivates high sensitivity underground X-ray measurements as critical tests of Quantum Gravity and of the very microscopic space-time structure., Comment: 13 pages, 2 figures. arXiv admin note: substantial text overlap with arXiv:2209.00074

Published
2023

22. Studies of low-energy K$^{-}$-nucleus/nuclei interactions with light nuclei by AMADEUS

Author

Magdalena Skurzok, Massimiliano Bazzi, Mario Bragadireanu, Damir Bosnar, Michael Cargnelli, Alberto Clozza, Luca De Paolis, Raffaele Del Grande, Laura Fabbietti, Carlo Guaraldo, Mihai Iliescu, Paolo Levi Sandri, Johann Marton, Marco Miliucci, Paweł Moskal, Kristian Piscicchia, Angels Ramos, Alessandro Scordo, Michał Silarski, Diana Laura Sirghi, Florin Sirghi, Antonio Spallone, Oton Vazquez Doce, Sławomir Wycech, Johann Zmeskal, and Catalina Curceanu

Subjects
General Medicine
Abstract

The AMADEUS Collaboration aims to provide unique experimental constraints to the antikaon-nucleon strong interaction in the regime of nonperturbative QCD. The K− nuclear captures, both at-rest and in-flight, are studied using the monochromatic low-momentum kaon beam (pK ∼ 120 MeV/c) produced at the DAΦNE collider, interacting with the KLOE detector materials. The studies are performed by reconstructing the hyperon-pion and hyperonnucleon final states. In this work a brief description of AMADEUS results for Λπ− and Λp final states is presented.

Published
2023

23. Topological charge-sharing background reduction for the Silicon Drift Detectors used by the VIP experiment at LNGS

Author

Marco Miliucci, Kristian Piscicchia, Massimiliano Bazzi, Mario Bragadireanu, Michael Cargnelli, Alberto Clozza, Luca De Paolis, Raffaele Del Grande, Carlo Guaraldo, Mihail Iliescu, Matthias Laubenstein, Johann Marton, Edoardo Milotti, Fabrizio Napolitano, Alessio Porcelli, Alessandro Scordo, Francesco Sgaramella, Diana Laura Sirghi, Florin Sirghi, Oton Vazquez Doce, Johann Zmeskal, and Catalina Curceanu

Subjects
Radiation
Published
2023

24. High precision Kaonic Deuterium measurement at the DAΦNE collider: the SIDDHARTA-2 experiment and the SIDDHARTINO run

Author

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

Subjects
mesonic, solid-state detectors, radiation detectors, hyperonic and antiprotonic atoms and molecules, x- and Γ-ray spectroscopy, kaonic atoms, SIDDHARTA-2
Abstract

The kaonic deuterium 2p→1s transition X-ray measurement, a fundamental information needed for a deeper understanding of the Quantum ChromoDynamics (QCD) in the strangeness sector, is still missing. The SIDDHARTA-2 collaboration is now ready to achieve this unprecedented result thanks to the dedicated experimental apparatus that will allow to obtain the values of the kaonic deuterium K-transitions with a precision comparable to the most precise kaonic hydrogen measurement to-date performed by SIDDHARTA in 2009. Both the kaonic hydrogen and kaonic deuterium X-ray spectroscopy measurements of the de-excitation towards the fundamental level are a direct probe on KN interaction at threshold, as opposed to the scattering experiments which need an extrapolation to zero energy. Combining these results through the Deser-Truemann like formula, the isospin-dependent kaon-nucleon scattering lengths can be obtained in a model-independent way. The SIDDHARTA-2 setup is presently installed at the DAΦNE (Double Annular Φ Factory for Nice Experiments) collider of Istituto Nazionale di Fisica Nucleare – Laboratori Nazionali di Frascati and it is ready to perform the challening kaonic deuterium measurement. Thispaper provides an overview on the SIDDHARTA-2 experimental apparatus and a preliminary result of the kaonic helium run, preparatory for the SIDDHARTA-2 data taking campaign, is also presented.

Published
2022

25. Strongest Atomic Physics Bounds on Noncommutative Quantum Gravity Models

Author

Kristian Piscicchia, Andrea Addazi, Antonino Marcianò, Massimiliano Bazzi, Michael Cargnelli, Alberto Clozza, Luca De Paolis, Raffaele Del Grande, Carlo Guaraldo, Mihail Antoniu Iliescu, Matthias Laubenstein, Johann Marton, Marco Miliucci, Fabrizio Napolitano, Alessio Porcelli, Alessandro Scordo, Diana Laura Sirghi, Florin Sirghi, Oton Vazquez Doce, Johann Zmeskal, and Catalina Curceanu

Subjects
High Energy Physics - Theory, High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), High Energy Physics - Theory (hep-th), FOS: Physical sciences, General Physics and Astronomy, General Relativity and Quantum Cosmology (gr-qc), General Relativity and Quantum Cosmology
Abstract

Investigations of possible violations of the Pauli Exclusion Principle represent critical tests of the microscopic space-time structure and properties. Space-time non-commutativity provides a class of universality for several Quantum Gravity models. In this context the VIP-2 Lead experiment sets the strongest bounds, searching for Pauli Exclusion Principle violating atomic-transitions in lead, excluding the $\theta$-Poincar\'e Non Commutative Quantum Gravity models far above the Planck scale for non-vanishing $\theta_{\mu \nu}$ ``electric-like'' components, and up to $6.9 \cdot 10^{-2}$ Planck scales if $\theta_{0i} = 0$., Comment: 7 pages, 2 figures

Published
2022

26. Testing Pauli Exclusion Principle for electrons at the LNGS underground laboratory: The VIP-2 experiment

Author

Luca De Paolis, Fabrizio Napolitano, kristian Piscicchia, Sergio Bartalucci, Sergio Bertolucci, Massimiliano Bazzi, Mario bragadireanu, Michael Cargnelli, Alberto Clozza, Carlo Fiorini, Carlo Guaraldo, Mihai Iliescu, Matthias Laubenstein, Johann Marton, Marco Miliucci, Edoardo Milotti, Alessio Porcelli, Alessandro Scordo, Francesco Sgaramella, Hexi Shi, Florin Catalin Sirghi, Johann Zmeskal, Catalina Curceanu, Raffaele Del Grande, and Diana Laura SIRGHI

Published
2022

27. Summary of the $K^- pp$ bound-state observation in E15 and future prospects

Author

Fuminori Sakuma, Shuhei Ajimura, Takaya Akaishi, Hidemitsu Asano, Massimiliano Bazzi, George Beer, Hyoungchan Bhang, Mario Bragadireanu, Paul Buehler, Luigi Busso, Michael Cargnelli, Seonho Choi, Alberto Clozza, Catalina Curceanu, Shun Enomoto, Hiroyuki Fujioka, Yuya Fujiwara, Tomokazu Fukuda, Carlo Guaraldo, Tadashi Hashimoto, Ryugo S. Hayano, Toshihiko Hiraiwa, Masami Iio, Mihai Iliescu, Kentaro Inoue, Yosuke Ishiguro, Takashi Ishikawa, Shigeru Ishimoto, Kenta Itahashi, Masahiko Iwasaki, Masaaki Iwai, Koki Kanno, Kazuma Kato, Yuko Kato, Shingo Kawasaki, Paul Kienle, Hiroshi Kou, Yue Ma, Johann Marton, Yasuyuki Matsuda, Marco Miliucci, Yutaka Mizoi, Ombretta Morra, Rie Murayama, Tomofumi Nagae, Hiroyuki Noumi, Hiroaki Ohnishi, Shinji Okada, Haruhiko Outa, Kyoichiro Ozawa, Kristian Piscicchia, Yuta Sada, Atsushi Sakaguchi, Masaharu Sato, Alessandro Scordo, Michiko Sekimoto, Hexi Shi, Kotaro Shirotori, Diana Sirghi, Florin Sirghi, Shoji Suzuki, Takatoshi Suzuki, Kiyoshi Tanida, Hideyuki Tatsuno, Makoto Tokuda, Dai Tomono, Akihisa Toyoda, Kyo Tsukada, Oton Vázquez Doce, Eberhard Widmann, Takumi Yamaga, Toshimitsu Yamazaki, Chihiro Yoshida, Qi Zhang, and Johann Zmeskal

Abstract

The possible existence of deeply-bound $\bar K$-nuclear bound states, kaonic nuclei, has been widely discussed as products of the strongly attractive $\bar K$Ninteraction in I = 0 channels. Investigations of those exotic states will provide us unique information of the $\bar K$Ninteraction below the threshold, which is still not fully understood so far. Recently, we observed the simplest kaonic nuclei, $\bar K$NN, having a much deeper binding energy than normal nuclei via inflight (K−,N) reactions at the J-PARC E15 experiment. For further studies, we have proposed a series of experimental programs for the systematic investigation of light kaonic nuclei, from $\bar K$N(Λ(1405)) to $\bar K$NNNN. We will measure the $\bar K$NNN(A= 3) system at the new experiment approved as J-PARC E80, as a first step toward a comprehensive study.

Published
2022

28. Analysis methods used and planned for VIP-2

Author

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

Abstract

VIP-2 (VIolation of Pauli exclusion principle - 2) is an underground experiment sited in the underground “Laboratori Nazionali del Gran Sasso.” It aims to investigate possible violations of the Pauli Exclusion Principle (PEP) and, in this context, Quantum Gravity models implying violations of PEP. While an upper limit of PEP violation probability is recently published, the data requires further developments of accurate analysis techniques and methods. In this contribution, we present an overview of the methodologies proposed for current and planned analysis.

Published
2022
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29. Kaonic atoms measurements at the DAΦNE collider : the SIDDHARTA-2 experiment

Author

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

Subjects
Physics, QC1-999, Nuclear Theory, Physics::Accelerator Physics, Physics::Atomic Physics, Nuclear Experiment
Abstract

The X-ray spectroscopy measurements of light kaonic atoms’ deexcitation towards the fundamental level provide unique information on the low-energy Quantum ChromoDynamics (QCD) in the strangeness sector, being a direct probe of the kaon/nucleon interaction at threshold, unobtainable through the scattering experiments. In this framework, the SIDDHARTA-2 collaboration is going to perform the first kaonic deuterium 2p → 1s transition measurement at the DAΦNE collider of Istituto Nazionale di Fisica Nucleare – Laboratori Nazionali di Frascati. Combining this measurement with the kaonic hydrogen one performed by SIDDHARTA in 2009 it will be possible to obtain, in a model-independent way, the isospin-dependent antikaon-nucleon scattering lengths. The paper introduces the SIDDHARTA-2 setup, an upgraded version with respect to the one used for the kaonic hydrogen measurement, dedicated to the ambitious kaonic deuterium measurement, together with the preliminary results obtained during the kaonic helium run, preparatory for the SIDDHARTA-2 data taking campaign.

Published
2022

30. Investigation of the low-energy $K^{−}$ hadronic interactions with light nuclei by AMADEUS

Author

Magdalena Skurzok, Massimiliano Bazzi, Mario Bragadireanu, Damir Bosnar, Michael Cargnelli, Alberto Clozza, Catalina Curceanu, Luca de Paolis, Raffaele Del Grande, Laura Fabbietti, Carlo Guaraldo, Mihai Iliescu, Masahiko Iwasaki, Paolo Levi Sandri, Johann Marton, Marco Miliucci, Pawel Moskal, Kristian Piscicchia, Angels Ramos, Alessandro Scordo, Michał Silarski, Diana Laura Sirghi, Florin Sirghi, Antonio Spallone, Oton Vazquez Doce, Sławomir Wycech, and Johann Zmeskal

Subjects
Nuclear and High Energy Physics, AMADEUS collaboration, antikaon-nucleon strong interaction, strangeness, Nuclear Theory, Astrophysics::Instrumentation and Methods for Astrophysics, General Physics and Astronomy, antikaon interactions in nuclear matter
Abstract

The aim of the AMADEUS collaboration is to provide new experimental constraints to the antikaon-nucleon ([Formula: see text]) strong interaction in the regime of nonperturbative QCD, investigating the low-energy [Formula: see text] hadronic interactions with light nuclei like H, 4He, 9Be and [Formula: see text]C. The unique low-momentum kaon beam produced at the DA[Formula: see text]NE collider is ideal to study [Formula: see text] nuclear captures, both at-rest and in-flight. The large acceptance KLOE detector, used as an active target, allows to achieve excellent position and momentum resolutions. In this work, a brief description of recent AMADEUS results is presented.

Published
2022

32. 'K−pp', a K‾-meson nuclear bound state, observed in 3He(K−,Λp)n reactions

Author

S. Kawasaki, K. Itahashi, C. Guaraldo, H. Kou, D. Tomono, Hexi Shi, Atsushi Sakaguchi, Paul Kienle, Florin Sirghi, T. Ishikawa, Michiko Sekimoto, Tomokazu Fukuda, Y. Fujiwara, S. Choi, Shinji Okada, O. Morra, T. Yamaga, Kiyoshi Tanida, T. Suzuki, Haruhiko Outa, Ryugo S. Hayano, Carolina Berucci, T. Yamazaki, L. Busso, Michael Cargnelli, S. Ishimoto, K. Inoue, Akihiro Toyoda, Shun Enomoto, Hiroyuki Noumi, Y. Kato, E. Widmann, Tomofumi Nagae, G. A. Beer, Paul Buehler, K. Kato, S. Ajimura, Masami Iio, Johann Marton, Hiroaki Ohnishi, Catalina Curceanu, Koki Kanno, Yue Ma, Y. Ishiguro, S. Y. Suzuki, K. Piscicchia, M. Sato, O. Vazquez Doce, Mario Bragadireanu, M. Iliescu, Kyo Tsukada, Yutaka Mizoi, H. Asano, J. Zmeskal, Yuji Matsuda, Makoto Tokuda, Hiroyuki Fujioka, Toshihiko Hiraiwa, H. Tatsuno, Ken Suzuki, Y. Sada, H. C. Bhang, Masahiko Iwasaki, Kotaro Shirotori, Q. Zhang, Alessandro Scordo, T. Hashimoto, Fuminori Sakuma, and Diana Sirghi

Subjects
Physics, Nuclear and High Energy Physics, Meson, 010308 nuclear & particles physics, 0103 physical sciences, Bound state, Analytical chemistry, Invariant mass, Strangeness, 010306 general physics, 01 natural sciences
Abstract

We observed a distinct peak in the Λp invariant mass spectrum of He 3 ( K − , Λ p ) n , well below m K + 2 m p , i.e., the mass threshold of the K − to be bound to two protons. By selecting a relatively large momentum-transfer region q = 350 ∼ 650 MeV/c, one can kinematically separate the peak from the quasi-free process, K ‾ N → K ‾ N followed by the non-resonant absorption by the two spectator-nucleons K ‾ N N → Λ N . We found that the simplest fit to the observed peak gives us a Breit–Wigner pole position at B Kpp = 47 ± 3 ( s t a t . ) − 6 + 3 ( s y s . ) MeV having a width Γ Kpp = 115 ± 7 ( s t a t . ) − 20 + 10 ( s y s . ) MeV, and the S-wave Gaussian reaction form-factor parameter Q Kpp = 381 ± 14 ( s t a t . ) − 0 + 57 ( s y s . ) MeV/c, as a new form of the nuclear bound system with strangeness – “ K − p p ”.

Published
2019

33. Silicon drift detectors technology for high precision light Kaonic atoms spectroscopic measurements at the DA Φ NE collider

Author

L. De Paolis, Marco Miliucci, G. Deda, Johann Marton, M. Iliescu, D. Bosnar, Magdalena Skurzok, C. Guaraldo, P. Levi Sandri, Fabrizio Napolitano, K. Piscicchia, Mario Bragadireanu, Carlo Fiorini, Alberto Clozza, R. Del Grande, J. Zmeskal, Florin Sirghi, Catalina Curceanu, Diana Sirghi, M. Bazzi, Hexi Shi, Michael Cargnelli, M. Iwasaki, O. Vazquez Doce, Marco Carminati, Szymon Niedźwiecki, Paweł Moskal, Michał Silarski, A. Spallone, F. Sgaramella, P. King, Alessandro Scordo, and M. Tüchler

Subjects
Physics, Silicon, Strong interaction, Detector, Resolution (electron density), chemistry.chemical_element, Strangeness, law.invention, Nuclear physics, Data acquisition, chemistry, law, Collider, Line (formation)
Abstract

The SIDDHARTA-2 collaboration developed an innovative large area Silicon Drift Detectors technology to perform high precision spectroscopy for the investigation of the K¯ N strong interaction in the low-energy regime, in the strangeness sector. The SIDDHARTA-2 devices take advantage of special geometry to maximize the experimental geometrical acceptance together with a dedicated Front End electronics able to provide energy resolution of 163 1 eV at 170 K for the Fe Kα line and a linear response better than 10-3, both preserved along the whole DAQ analog-digital chain in a colliding beams challenging environment. In this work the SIDDHARTA-2 Silicon Drift Detectors spectroscopic characterization and the preliminary results obtained at the DAΦNE collider of Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali di Frascati are presented.

Published
2021

34. γ-ray high sensitivity tests of Collapse Models

Author

Kristian Piscicchia, Massimiliano Bazzi, Mario Bragadireanu, Michael Cargnelli, Alberto Clozza, Luca De Paolis, Raffaele Del Grande, Carlo Guaraldo, Mihail Iliescu, Matthias Laubenstein, Johann Marton, Marco Miliucci, Fabrizio Napolitano, Alessio Porcelli, Alessandro Scordo, Francesco Sgarmella, Hexi Shi, Diana Laura Sirghi, Florin Sirghi, Oton Vazquez Doce, Johann Zmeskal, and Catalina Curceanu

Subjects
History, Computer Science Applications, Education, ddc
Abstract

The article reviews our recent experimental results on the Continuous Spontaneous Localization (CSL) model and on the gravity related collapse model developed by Diósi and Penrose (DP). These models of dynamical reduction of the wave function consist in non-linear and stochastic modifications of the Schröedinger equation, which lead to a progressive breakdown of the superposition principle, as the size of the system increases. We performed a high sensitivity survey of the spontaneous radiation phenomenon, predicted by the collapse models, at the Gran Sasso underground National Laboratory of INFN in Italy. Our studies set the strongest bounds on the CSL parameters, in a broad region of the parameters space, and rule out the DP in its present formulation.

Published
2020

35. (\bar{K}\)-Nuclear Bound State at J-PARC

Author

G. Beer, Michiko Sekimoto, L. Busso, Alessandro Scordo, Mario Bragadireanu, Ryugo S. Hayano, T. Hashimoto, K. Inoue, C. Guaraldo, Shoji Suzuki, Koki Kanno, Shigeru Ishimoto, O. Morra, Makoto Tokuda, Y. Sada, H. Asano, Johannes Zmeskal, Akihisa Toyoda, Diana Sirghi, Toshihiko Hiraiwa, M. Sato, Johann Marton, Michael Cargnelli, Y. Ishiguro, Paul Buehler, K. Kato, Y. Kato, Fuminori Sakuma, Paul Kienle, Kyo Tsukada, Kenta Itahashi, H. Tatsuno, Ken Suzuki, M. Iliescu, Yasuyuki Matsuda, Kotaro Shirotori, Kristian Piscicchia, T. Yamaga, Kiyoshi Tanida, Hexi Shi, H. Kou, Haruhiko Outa, Hiroyuki Noumi, Yue Ma, Takashi Ishikawa, S. Kawasaki, Oton Vazquez Doce, Hyoungchan Bhang, Catalina Curceanu, Hiroyuki Fujioka, Carolina Berucci, Tomokazu Fukuda, Y. Fujiwara, Florin Sirghi, Shinji Okada, D. Tomono, Takatoshi Suzuki, Atsushi Sakaguchi, S. Ajimura, Masami Iio, Hiroaki Ohnishi, Yutaka Mizoi, Toshimitsu Yamazaki, Tomofumi Nagae, Shun Enomoto, Seonho Choi, Qi Zhang, Eberhard Widmann, and Masahiko Iwasaki

Subjects
Nuclear physics, Physics, Bar (music), Bound state, J-PARC
Published
2020

36. Search for a remnant violation of the Pauli exclusion principle in a Roman lead target

Author

Matthias Laubenstein, Marco Miliucci, Diana Sirghi, Michael Cargnelli, Massimiliano Bazzi, Dorel Pietreanu, Johann Marton, Luca De Paolis, C. Guaraldo, Florin Sirghi, Mario Bragadireanu, Edoardo Milotti, Catalina Curceanu, Kristian Piscicchia, Laura Sperandio, Raffaele Del Grande, Oton Vazquez Doce, Sergio Bertolucci, Johann Zmeskal, Carlo Fiorini, A. Amirkhani, Sergio Bartalucci, Hexi Shi, Alessandro Scordo, A. Pichler, M. Iliescu, Alberto Clozza, J. P. Egger, Piscicchia, K., Milotti, E., Amirkhani, A., Bartalucci, S., Bertolucci, S., Bazzi, M., Bragadireanu, M., Cargnelli, M., Clozza, A., Del Grande, R., Depaolis, L., Egger, J. -P., Fiorini, C., Guaraldo, C., Iliescu, M., Laubenstein, M., Marton, J., Miliucci, M., Pichler, A., Pietreanu, D., Scordo, A., Shi, H., Sirghi, D. L., Sirghi, F., Sperandio, L., Vazquezdoce, O., Zmeskal, J., and Curceanu, C.

Subjects
Particle physics, Physics and Astronomy (miscellaneous), Cosmic ray, lcsh:Astrophysics, 02 engineering and technology, Electron, 01 natural sciences, Quantum mechanics, Tests of fundamental symmetries, Orders of magnitude (bit rate), X-ray, symbols.namesake, Lead (geology), Pauli exclusion principle, X-rays, 0103 physical sciences, lcsh:QB460-466, 0202 electrical engineering, electronic engineering, information engineering, Tests of fundamental symmetrie, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, Engineering (miscellaneous), Physics, 010308 nuclear & particles physics, Spin-statistics connection, symbols, lcsh:QC770-798, 020201 artificial intelligence & image processing, National laboratory
Abstract

In this paper we report on the results of two analyses of the data taken with a dedicated VIP-Lead experiment at the Gran Sasso National Laboratory of the INFN. We use measurements taken in an environment that is especially well screened from cosmic rays, with a metal target made of “Roman lead” which is characterised by a low level of intrinsic radioactivity. The analyses lead to an improvement, on the upper bounds of the Pauli Exclusion Principle violation for electrons, which is more than one (four) orders of magnitude, when the electron-atom interactions are described in terms of scatterings (or close encounters) respectively.

Published
2020
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37. New Concepts in Tests of the Pauli Exclusion Principle in Bulk Matter

Author

J.-P. Egger, Marco Miliucci, Florin Sirghi, Mario Bragadireanu, C. Guaraldo, Sergio Bartalucci, R. Del Grande, L. De Paolis, Hexi Shi, Johann Marton, O. Vazquez Doce, M. Iliescu, Matthias Laubenstein, J. Zmeskal, Diana Sirghi, D. Pietreanu, M. Bazzi, Carlo Fiorini, Alberto Clozza, S. Bertolucci, Edoardo Milotti, A. Pichler, Alessandro Scordo, Catalina Curceanu, K. Piscicchia, Laura Sperandio, A. Amirkhani, Michael Cargnelli, Milotti, E., Piscicchia, K., Amirkhani, A., Bartalucci, S., Bertolucci, S., Bazzi, M., Bragadireanu, M., Cargnelli, M., Clozza, A., Del Grande, R., De Paolis, L., Egger, J. -P., Fiorini, C., Guaraldo, C., Iliescu, M., Laubenstein, M., Marton, J., Miliucci, M., Pichler, A., Pietreanu, D., Scordo, A., Shi, H., Sirghi, D. L., Sirghi, F., Sperandio, L., Vazquez Doce, O., Zmeskal, J., and Curceanu, C.

Subjects
Physics, electron diffusion, 010308 nuclear & particles physics, quantum mechanics, General Physics and Astronomy, experimental tests, quantum mechanic, 01 natural sciences, Theoretical physics, symbols.namesake, Pauli exclusion principle, electron capture, experimental test, 0103 physical sciences, symbols
Abstract

The standard scheme of several tests of the Pauli Exclusion Principle in bulk matter — both in the experiment and in the subsequent data analysis — has long been based on the seminal paper by E. Ramberg, G.A. Snow [Phys. Lett. B 238, 438 (1990)]. The ideas exposed in that paper are so simple and immediate that they have long gone unchallenged. However, while some of the underlying approximations are still valid, other parts of the article must be reconsidered. Here, we discuss some new concepts thatare related to the motion of the electrons in the test metal (the “target” of the experiment) and which have been recently studied in the framework of the VIP-2 Collaboration.

Published
2020

38. Studies of kaonic atoms at the DAΦNE collider: From SIDDHARTA to SIDDHARTA-2

Author

Michał Silarski, Paolo Levi Sandri, Mario Bragadireanu, Florin Sirghi, A. Spallone, C. Guaraldo, Marco Miliucci, Johann Marton, Laura Fabbietti, M. Iwasaki, Kristian Piscicchia, Carlo Fiorini, Raffaele Del Grande, Oton Vazquez Doce, Diana Sirghi, Massimiliano Bazzi, Marco Carminati, Catalina Curceanu, Magdalena Skurzok, Dorel Pietreanu, A. Baniahmad, M. Iliescu, Luca De Paolis, Shinji Okada, Johann Zmeskal, Damir Bosnar, Paweł Moskal, Alessandro Scordo, Michael Cargnelli, Szymon Niedźwiecki, M. Tüchler, A. Amirkhani, Eberhard Widmann, and Alberto Clozza

Subjects
History, Strange quark, Kaonic hydrogen, Strong interaction, Nuclear Theory, Electron, 01 natural sciences, 7. Clean energy, Education, law.invention, Nuclear physics, law, 0103 physical sciences, Physics::Atomic Physics, 010306 general physics, Collider, Nuclear Experiment, Physics, 010308 nuclear & particles physics, Scattering, NATURAL SCIENCES. Physics, Computer Science Applications, PRIRODNE ZNANOSTI. Fizika, Deuterium, Physics::Accelerator Physics, High Energy Physics::Experiment, Nucleon
Abstract

The DAΦNE electron-positron collider of the Laboratori Nazionali di Frascati of INFN is a worldwide unique low-energy kaon source and for this reason is suitable for low-energy kaon physics like kaonic atoms and kaon-nucleons/nuclei interaction studies. Kaonic atoms are atomic systems where an electron is replaced by a negatively charged kaon, containing the strange quark, which interacts in the lowest orbits with the nucleus also by the strong interaction. As a result, their study offers the unique opportunity to perform experiments equivalent to scattering at vanishing relative energy. This allows to study the strong interaction between the antikaon and the nucleon or the nucleus “at threshold”, without the need of ad hoc extrapolation to zero energy, as in scattering experiments. The most precise kaonic hydrogen measurement to date, together with an exploratory measurement of kaonic deuterium, were carried out by the SIDDHARTA collaboration at the DAΦNE electron-positron collider of LNF-INFN, by combining the excellent quality kaon beam delivered by the collider with new experimental techniques, as fast and precise Silicon-Drift X-ray Detectors. The measurement of kaonic deuterium will be realized in the near future by SIDDHARTA-2, a major upgrade of SIDDHARTA.

Published
2020

39. The key role of the Silicon Drift Detectors in testing the Pauli Exclusion Principle for electrons: the VIP-2 experiment

Author

Marco Miliucci, Johann Zmeskal, Sergio Bartalucci, Hexi Shi, Alessandro Scordo, Florin Sirghi, Mario Bragadireanu, J.-P. Egger, D. Pietreanu, S. Bertolucci, Matthias Laubenstein, A. Pichler, K. Piscicchia, Edoardo Milotti, T. Mazzocchi, Johann Marton, A. Amirkhani, Alberto Clozza, Laura Sperandio, M. Bazzi, R. Del Grande, L. De Paolis, Diana Sirghi, C. Guaraldo, Catalina Curceanu, Michael Cargnelli, Carlo Fiorini, M. Veith, M. Iliescu, O. Vazquez Doce, Paolis, L De, Amirkhani, A, Bartalucci, S, Bertolucci, S, Bazzi, M, Bragadireanu, M, Cargnelli, M, Clozza, A, Curceanu, C, Grande, R Del, Egger, J P, Fiorini, C, Guaraldo, C, Iliescu, M, Laubenstein, M, Marton, J, Mazzocchi, T, Miliucci, M, Milotti, E, Pichler, A, Pietreanu, D, Piscicchia, K, Scordo, A, Shi, H, Sirghi, D L, Sirghi, F, Sperandio, L, Vazquez Doce, O, Veith, M, and Zmeskal, J

Subjects
Physics, Paper, History, Silicon, 010308 nuclear & particles physics, Detector, chemistry.chemical_element, Electron, 01 natural sciences, Quantum mechanic, Quantum mechanics, Experimental tests, Spin-statistics connection, Computer Science Applications, Education, ddc, symbols.namesake, Pauli exclusion principle, chemistry, 0103 physical sciences, symbols, Key (cryptography), 010306 general physics
Abstract

The VIP experiment performed an accurate investigation of the Pauli Exclusion Principle for electrons. The apparatus was installed in the Gran Sasso Laboratories of the National Institute of Nuclear Physic in Italy, an underground environment with an extremely low cosmic background. The aim of the experiment was to test the Pauli Exclusion Principle for electrons in a copper target circulated by a Direct Current (DC) current, searching for X-rays emission due to an atomic transition forbidden by Pauli exclusion principle, from the L shell to the K shell of copper when the K shell is already occupied by two electrons. VIP set an upper limit on the Pauli exclusion principle violation probability 1/2β 2 –29. The goal of the upgraded VIP-2 experiment, presently in data taking at Gran Sasso Laboratories, is to improve this limit by two orders of magnitude. The VIP-2 experimental apparatus, in which the Silicon Drift Detectors have the key role of X-ray detectors, and preliminary results are presented.

Published
2020

40. Probing low-energy QCD with kaonic atoms at $DA\Phi NE$

Author

Michael Cargnelli, Claude Amsler, Johann Marton, Paul Alois Buhler, M. Iwasaki, Florin Sirghi, P. Levi Sandri, Michał Silarski, Alessandro Scordo, Johann Zmeskal, O. Vazquez Doce, Magdalena Skurzok, K. Piscicchia, Alberto Clozza, Marco Miliucci, Laura Fabbietti, A. Amirkhani, Mario Bragadireanu, M. Bazzi, A. Baniahmad, Marco Carminati, L. De Paolis, M. Iliescu, R. Del Grande, M. Tüchler, C. Guaraldo, Diana Sirghi, Szymon Niedzwiecki, D. Bosnar, Catalina Curceanu, E. Widmann, A. Spallone, Carlo Fiorini, Shinji Okada, and Paweł Moskal

Subjects
Physics, Quantum chromodynamics, Nuclear physics, History, Low energy, Computer Science Applications, Education
Abstract

X-ray spectroscopy of kaonic atoms provides a versatile tool to study the strong interaction at low energies via a direct observation of its influence on the ground state of kaonic hydrogen atoms. The SIDDHARTA experiment provided precise results on the energy shift and width of the kaonic hydrogen 1s state induced by the strong interaction. To enable the extraction of the antikaon-nucleon scattering lengths a0 and a1, SIDDHARTA-2 aims to determine the energy shift and width in kaonic deuterium with precisions of 30 eV and 75 eV, respectively. This measurement is aggravated by the low kaonic deuterium X-ray yield and a high background environment and will only be possible by implementing a severe upgrade on the SIDDHARTA apparatus.

Published
2020

41. K - Pp bound system at J-PARC

Author

Eberhard Widmann, M. Iliescu, Haruhiko Outa, Hiroaki Ohnishi, K. Inoue, Yasuyuki Matsuda, Hiroyuki Noumi, Takashi Ishikawa, Makoto Tokuda, Masahiko Iwasaki, H. Tatsuno, Akihisa Toyoda, Toshimitsu Yamazaki, D. Tomono, M. Sato, Paul Kienle, Ken Suzuki, Michael Cargnelli, Kotaro Shirotori, Florin Sirghi, Hiroyuki Fujioka, Atsushi Sakaguchi, G. Beer, Oton Vazquez Doce, Shun Enomoto, Shinji Okada, Yue Ma, Hyoungchan Bhang, Mario Bragadireanu, Paul Buehler, K. Kato, Alessandro Scordo, T. Hashimoto, H. Kou, O. Morra, Johann Marton, Catalina Curceanu, Johannes Zmeskal, Y. Kato, Carolina Berucci, S. Kawasaki, Takatoshi Suzuki, Seonho Choi, L. Busso, S. Ajimura, Tomofumi Nagae, Masami Iio, Fuminori Sakuma, Y. Ishiguro, Qi Zhang, Y. Sada, Tomokazu Fukuda, Y. Fujiwara, Yutaka Mizoi, Kyo Tsukada, C. Guaraldo, Ryugo S. Hayano, H. Asano, Toshihiko Hiraiwa, Shigeru Ishimoto, Koki Kanno, Shoji Suzuki, Kristian Piscicchia, T. Yamaga, Kiyoshi Tanida, Hexi Shi, Diana Sirghi, Michiko Sekimoto, and Kenta Itahashi

Subjects
Physics, Binding energy, Bound state, J-PARC, State (functional analysis), Atomic physics
Abstract

The K¯NN bound system, symbolically denoted as “K−pp”, is the simplest K¯-nuclear bound system which has been widely discussed as a consequence of the strongly attractive K¯N interaction in I = 0 channels. Many theoretical works have pointed out the existence of the “K−pp” bound system, but the calculated properties such as the binding energy and the width spread out due to the uncertainty of the K¯N interaction below the K¯+N mass threshold. Experimentally, there are several reports on observation of a “K−pp” candidate with the binding energy of around 100 MeV, however, no definitive evidence was available so far. At J-PARC, we conducted a experimental search for the “K−pp” bound system using K− + 3He reaction at 1.0 GeV/c where the “K−pp” is expected to be directly produced via the (K−, n) reaction. We finally observed a bound state below the K− +p+p mass threshold in the Λpn final state, which can be interpreted as the “K− pp” bound state. The possible existence of the “K− pp” state is discussed from both aspects of production and decay.

Published
2020

42. Testing the Pauli Exclusion Principle in the Cosmic Silence

Author

Florin Sirghi, Michael Cargnelli, Matthias Laubenstein, M. Bazzi, M. Iliescu, J.-P. Egger, Hexi Shi, Alberto Clozza, L. De Paolis, Diana Sirghi, Carlo Fiorini, C. Guaraldo, Mario Bragadireanu, Marco Miliucci, O. Vazquez Doce, Edoardo Milotti, J. Zmeskal, Sergio Bartalucci, Laura Sperandio, D. Pietreanu, Alessandro Scordo, K. Piscicchia, S. Bertolucci, A. Pichler, Catalina Curceanu, R. Del Grande, A. Amirkhani, Johann Marton, Piscicchia, K., Pichler, A., Amirkhani, A., Bartalucci, S., Bertolucci, S., Bazzi, M., Bragadireanu, M., Cargnelli, M., Clozza, A., Del Grande, R., De Paolis, L., Egger, J., Fiorini, C., Guaraldo, C., Iliescu, M., Laubenstein, M., Marton, J., Miliucci, M., Milotti, E., Pietreanu, D., Scordo, A., Shi, H., Sirghi, D. L., Sirghi, F., Sperandio, L., Vazquez Doce, O., Zmeskal, J., and Curceanu, C.

Subjects
Physics, COSMIC cancer database, 010308 nuclear & particles physics, quantum mechanics, General Physics and Astronomy, experimental tests, quantum mechanic, X-ray detectors, 01 natural sciences, Silence, symbols.namesake, Theoretical physics, Pauli exclusion principle, experimental test, 0103 physical sciences, symbols
Abstract

The VIP Collaboration is performing high precision tests of the Pauli Exclusion Principle for electrons in the extremely low cosmic background environment of the Underground Gran Sasso Laboratories of INFN (Italy). The experimental technique consists in introducing a DC current in a copper conductor, searching for Kα PEP-forbidden atomic transitions when the K shell is already occupied by two electrons. VIP set an upper limit on the PEP-violation probability (½) x β^2 < 4.7 × 10^−29. The aim of the upgraded VIP-2 experiment is to improve this result at least by two orders of magnitude. The improved experimental setup and the results of a preliminary data analysis, corresponding to the the first run of the VIP-2 data taking (2016–2017), will be presented.

Published
2020
Full Text
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43. Recent AMADEUS studies of low-energy $K^{−}$ - nucleus/nuclei interactions

Author

Florin Sirghi, Kristian Piscicchia, Michael Cargnelli, Alessandro Scordo, M. Iliescu, Massimiliano Bazzi, Paolo Levi Sandri, Mario Bragadireanu, Luca De Paolis, Oton Vazquez Doce, A. Spallone, Magdalena Skurzok, Damir Bosnar, Johann Zmeskal, Raffaele Del Grande, Paweł Moskal, Marco Miliucci, Diana Sirghi, Eberhard Widmann, C. Guaraldo, Catalina Curceanu, Carlo Fiorini, S. Wycech, Laura Fabbietti, Michał Silarski, Angels Ramos, and Johann Marton

Subjects
Nuclear physics, Physics, Light nucleus, medicine.anatomical_structure, Low energy, strangeness, medicine, antikaon interactions in nuclear matter, Strangeness, Nucleus
Abstract

We briefly report the recent results obtained by the AMADEUS collaboration on experimental studies of the K\(^-\) low-energy interactions with light nuclei and outline the future perspectives.

Published
2020

44. Kaonic atoms experiment at the $DA\Phi NE$ collider by SIDDHARTA/SIDDHARTA-2

Author

Magdalena Skurzok, M. Bazzi, A. Spallone, M. Iwasaki, Oton Vazquez Doce, Florin Sirghi, Rafael Del Grande, Paweł Moskal, Alberto Clozza, Carlo Fiorini, C. Guaraldo, Laura Fabbietti, Marco Carminati, Mario Bragadireanu, P. Levi Sandri, Johann Zmeskal, Johann Marton, Alessandro Scordo, Michał Silarski, Abdollah Amirkhani, Mariana Iliescu, Eberhard Widmann, M. Tüchler, Susumu Okada, Szymon Niedźwiecki, Diana Sirghi, Catalina Curceanu, A. Baniahmad, L. De Paolis, Marco Miliucci, D. Pietreanu, D. Bosnar, Kristian Piscicchia, and Michael Cargnelli

Subjects
Physics, 010308 nuclear & particles physics, QC1-999, 01 natural sciences, law.invention, Nuclear physics, law, 0103 physical sciences, Physics::Accelerator Physics, High Energy Physics::Experiment, 010306 general physics, Collider, Nuclear Experiment
Abstract

The excellent quality kaon beam provided by the DA\PhiΦNE collider of LNF-INFN (Italy) together with SIDDHARTA/SIDDHARTA-2 new experimental techniques, as very precise and fast-response X-ray detectors, allow to perform unprecedented measurements on light kaonic atoms crucial for a deeper understanding of the low-energy quantum chromodynamics (QCD) in the strangeness sector. In this paper an overview of the main results obtained by the SIDDHARTA collaboration, as well as the future plans related to the SIDDHARTA-2 experiment, are discussed.

Published
2020

45. VIP-2 - Testing spin-statistics for electrons with high sensitivity

Author

D. Pietreanu, S. Bertolucci, Michael Cargnelli, Florin Sirghi, J.-P. Egger, O. Vazquez-Doce, Matthias Laubenstein, A. Pichler, Johann Zmeskal, Johann Marton, Diana Sirghi, A. Amirkahani, Sergio Bartalucci, M. Bazzi, Hexi Shi, K. Piscicchia, Edoardo Milotti, Alberto Clozza, C. Guaraldo, L. De Paolis, M. Iliescu, Laura Sperandio, Alessandro Scordo, Catalina Curceanu, Mario Bragadireanu, Marton, J., Amirkahani, A., Bartalucci, S., Bazzi, M., Bertolucci, S., Bragadireanu, M., Cargnelli, M., Clozza, A., Curceanu, C., De Paolis, L., Egger, J. -P., Guaraldo, C., Iliescu, M., Laubenstein, M., Milotti, E., Pichler, A., Pietreanu, D., Piscicchia, K., Scordo, A., Shi, H., Sirghi, D., Sirghi, F., Sperandio, L., Vazquez-Doce, O., and Zmeskal, J.

Subjects
Paper, Physics, History, Pauli principle, quantum mechanics, experimental test, quantum mechanic, Electron, 01 natural sciences, ddc, 010305 fluids & plasmas, Computer Science Applications, Education, 0103 physical sciences, Sensitivity (control systems), Atomic physics, 010306 general physics, Spin-½
Abstract

The VIP-2 (VIolation of the Pauli Exclusion Principle) experiment conducted at the Gran Sasso underground laboratory (LNGS) of INFN is searching for possible tiny violations of standard quantum mechanics in copper atoms with extremely high sensitivity. We investigate atomic transitions with precision X-ray spectroscopy in order to test the Pauli Exclusion Principle (PEP) and therefore the spin-statistics theorem. We present the experimental method for the search for "anomalous" (i.e. Pauli-forbidden) X-ray transitions in copper atoms, produced by "new" electrons, which could have a tiny probability to undergo a Pauli-forbidden transition to the 1s ground state already occupied by two electrons. We describe the VIP-2 experimental setup and its recent optimisations. Presently VIP-2 is taking data at LNGS. The goal of VIP-2 is to test PEP for electrons with unprecedented accuracy, down to a limit in the probability that PEP is violated at the level of 10-31 (and using a more elaborate analysis even 10-40). We present current experimental results.

Published
2020
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46. A novel approach to the measurement of the hyperon nucleon/s interaction by AMADEUS

Author

Kristian Piscicchia, Michael Cargnelli, Raffaele Del Grande, Laura Fabbietti, Johann Marton, Pawel Moskal, Àngels Ramos, Alessandro Scordo, Diana Sirghi, Magdalena Skurzok, Oton Vazquez Doce, Slavomir Wycech, Johann Zmeskal, Paolo Branchini, Eryk Czerwinski, Veronica De Leo, Erika De Lucia, Alessandro Di Cicco, Eleonora Diociaiuti, Paolo Fermani, Salvatore Fiore, Matteo Martini, Elena Perez Del Rio, Andrea Selce, Michal Silarski, and Catalina Curceanu

Abstract

The AMADEUS collaboration is investigating the low-energy antikaon interactions with nucleons and nuclei, taking advantage of the lowmomentum antikaons beam provided by the DAΦNE collider at LNF-INFN. In this work a novel technique is outlined for the measurement of the hyperonnucleon two and three body scattering cross sections. The method consists in producing hyperons by antikaons atomic captures in light nuclear targets, and extrapolating the cross sections from the measurement of the yields of the corresponding elastic final state interactions of the hyperons. The feasibility of this kind of analyses is shown by comparison of calculated Σ0 production in 4He by K− absorption on three nucleons, with a sample of K−12C absorption measured by AMADEUS in collaboration with KLOE. The feasibility of a dedicated high statistics measurement is discussed.

Published
2022

47. High precision test of the Pauli Exclusion Principle for electrons

Author

Hexi Shi, M. Veith, R. Del Grande, L. De Paolis, Matthias Laubenstein, Florin Sirghi, J.-P. Egger, Sergio Bartalucci, O. Vazquez Doce, C. Guaraldo, Marco Miliucci, Edoardo Milotti, Mario Bragadireanu, D. Laura Sirghi, Dorel Pietreanu, K. Piscicchia, T. Mazzocchi, Alberto Clozza, Michael Cargnelli, Laura Sperandio, Johann Zmeskal, A. Amirkhani, Sergio Bertolucci, Johann Marton, M. Bazzi, A. Pichler, Catalina Curceanu, M. Iliescu, Alessandro Scordo, and Carlo Fiorini

Subjects
Physics, Paper, History, COSMIC cancer database, 010308 nuclear & particles physics, Electron shell, Electron, Copper conductor, engineering.material, 01 natural sciences, Computer Science Applications, Education, L-shell, ddc, Nuclear physics, symbols.namesake, Pauli exclusion principle, 0103 physical sciences, symbols, engineering, Limit (mathematics), 010306 general physics, Order of magnitude
Abstract

The VIP collaboration is performing high precision tests of the Pauli Exclusion Principle for electrons in the extremely low cosmic background environment of the Underground Gran Sasso Laboratories of INFN (Italy). The experimental technique consists in introducing a DC current in a copper conductor, searching for the X-rays emission due to a PEP-forbidden atomic transition from the L shell to the K shell of copper when the K shell is already occupied by two electrons. VIP set un upper limit on the PEP violation probability 1 2 β 2 < 4.7 × 10 − 29 , the aim of the upgraded VIP-2 experiment is to improve this result by two orders of magnitude at least. The experimental setup and the results of preliminary data analyses will be presented.

Published
2019

48. Kaonic Atom Experiments at J-PARC

Author

Johann Marton, K. Itahashi, James P. Hays-Wehle, Daniel S. Swetz, O. Morra, M. Iliescu, H. Asano, L. Busso, M. Bazzi, Tomokazu Fukuda, Shinji Okada, C. Guaraldo, Diana Sirghi, T. Yamazaki, Joseph W. Fowler, Toshihiko Hiraiwa, A. Takamine, M. Sekimoto, Tomofumi Nagae, Michael Cargnelli, Shigeru Ishimoto, Kotaro Shirotori, Ken Suzuki, Shun Enomoto, Shinya Yamada, M. Sato, D. A. Bennett, D. Tomono, Yuto Ichinohe, R. Hayakawa, Atsushi Sakaguchi, A. D. Butt, O. Vazquez Doce, Gene C. Hilton, Carl D. Reintsema, Fredrik Gustafsson, Yutaka Mizoi, Hiroyuki Fujioka, Takaya Ohashi, Carolina Berucci, Y. Sada, Yuichiro Ezoe, Ryugo S. Hayano, H. Tatsuno, Malcolm Durkin, C. Han, Johann Zmeskal, M. Iwasaki, T. Murakami, T. Yamaga, Kiyoshi Tanida, Galen C. O'Neil, Kyo Tsukada, T. Hayashi, Y. Iizawa, Hexi Shi, Daniel Schmidt, S. Kawasaki, Fuminori Sakuma, T. Nishi, Yoshitaka Ishisaki, S. Aikawa, C. Trippl, Alessandro Scordo, T. Hashimoto, K. Piscicchia, Seonho Choi, Yasuhiro H. Matsuda, Akihiro Toyoda, Hirofumi Noda, Catalina Curceanu, D. Bosnar, Joel N. Ullom, K. Nunomura, P. Bhler, T. Suzuki, Mario Bragadireanu, Florin Sirghi, William B. Doriese, T. Akaishi, E. Widmann, S. Ajimura, Masami Iio, Yue Ma, Hiroaki Ohnishi, Haruhiko Outa, K. Inoue, Hiroyuki Noumi, G. A. Beer, S. Y. Suzuki, and Jens Uhlig

Subjects
Nuclear physics, Physics, Light nucleus, Particle properties, Deuterium, Atom, J-PARC, Charged particle
Published
2019

49. Results of \(\bar{K}NN\) Search via the (K−, n) Reaction at J-PARC

Author

Hexi Shi, Paul Kienle, L. Busso, Florin Sirghi, Michael Cargnelli, Y. Sada, Shinji Okada, Oton Vazquez Doce, Carolina Berucci, Catalina Curceanu, Ryugo S. Hayano, C. Guaraldo, Shun Enomoto, Johann Zmeskal, Johann Marton, Takashi Ishikawa, Kotaro Shirotori, O. Morra, H. Tatsuno, T. Yamaga, S. Kawasaki, Toshimitsu Yamazaki, Paul Buehler, Kiyoshi Tanida, Ken Suzuki, Y. Ishiguro, D. Tomono, K. Kato, Yue Ma, H. Asano, Shigeru Ishimoto, Y. Kato, Atsushi Sakaguchi, Mario Bragadireanu, Toshihiko Hiraiwa, M. Iliescu, M. Sato, Yutaka Mizoi, Eberhard Widmann, Hiroyuki Fujioka, Michiko Sekimoto, Takatoshi Suzuki, Kyo Tsukada, Yasuyuki Matsuda, Kristian Piscicchia, Hyeongchan Bhang, Tomokazu Fukuda, S. Ajimura, Masahiko Iwasaki, Haruhiko Outa, Masami Iio, Y. Fujiwara, Makoto Tokuda, Hiroaki Ohnishi, Tomofumi Nagae, Hiroyuki Noumi, Seonho Choi, Qi Zhang, Akihisa Toyoda, Fuminori Sakuma, G. Beer, Alessandro Scordo, T. Hashimoto, K. Inoue, Kenta Itahashi, Diana Sirghi, Hirofumi Kou, Koki Kanno, and Shoji Suzuki

Subjects
Physics, Bar (music), Analytical chemistry, J-PARC
Published
2019

50. Λ(1405) Spectroscopy via the In-flight d(K−, n) Reaction at the J-PARC K1.8BR

Author

Florin Sirghi, Kotaro Shirotori, T. Akaishi, Michiko Sekimoto, Tomofumi Nagae, Takatoshi Suzuki, M. Iliescu, Hiroyuki Fujioka, Eberhard Widmann, S. Ajimura, Masami Iio, Hiroaki Ohnishi, Johann Zmeskal, Paul Buehler, K. Kato, Masahiko Iwasaki, Yasuyuki Matsuda, Kyo Tsukada, Johann Marton, Kristian Piscicchia, Toshimitsu Yamazaki, Shun Enomoto, Shinji Okada, G. Beer, H. Asano, C. Guaraldo, Paul Kienle, S. Kawasaki, Shu Aikawa, Yutaka Mizoi, Tomokazu Fukuda, Makoto Tokuda, Takashi Ishikawa, Toshihiko Hiraiwa, Y. Kato, Alessandro Scordo, T. Hashimoto, Shigeru Ishimoto, O. Morra, K. Inoue, Yue Ma, Ryugo S. Hayano, Y. Fujiwara, Haruhiko Outa, Catalina Curceanu, Zhadyra Omar, M. Iwai, Fuminori Sakuma, Kenta Itahashi, Yusuke Komatsu, Akihisa Toyoda, Hiroyuki Noumi, A. O. Tokiyasu, D. Tomono, Diana Sirghi, Atsushi Sakaguchi, Hirofumi Kou, Y. Ishiguro, H. Yim, L. Busso, Y. Sada, Shoji Suzuki, Koki Kanno, M. Sato, H. Tatsuno, Michael Cargnelli, Ken Suzuki, Mario Bragadireanu, Hexi Shi, T. Yamaga, Kiyoshi Tanida, Seonho Choi, Qi Zhang, Carolina Berruci, and Oton Vazquez Doce

Subjects
Physics, Analytical chemistry, J-PARC, Spectroscopy
Published
2019

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