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S Bartalucci - One of the best experts on this subject based on the ideXlab platform.
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VIP-2 —High-Sensitivity Tests on the Pauli Exclusion Principle for Electrons
Entropy, 2020Co-Authors: Kristian Piscicchia, J Marton, S Bartalucci, S Bertolucci, M Bragadireanu, Massimiliano Bazzi, A Clozza, Michael Cargnelli, Raffaele Del Grande, Luca De PaolisAbstract: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 in 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.
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high precision test of the pauli Exclusion Principle for electrons
Condensed Matter, 2019Co-Authors: Kristian Piscicchia, S Bartalucci, S Bertolucci, M Bragadireanu, Massimiliano Bazzi, A Clozza, Michael Cargnelli, Catalina Curceanu, Abdollah Amirkhani, Raffaele Del GrandeAbstract: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.
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high precision test of the pauli Exclusion Principle for electrons
Condensed Matter, 2019Co-Authors: Kristian Piscicchia, S Bartalucci, S Bertolucci, M Bragadireanu, Massimiliano Bazzi, A Clozza, Michael Cargnelli, Catalina Curceanu, Abdollah Amirkhani, Raffaele Del GrandeAbstract: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.
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experimental search for the violation of pauli Exclusion Principle vip 2 collaboration
European Physical Journal C, 2018Co-Authors: E Milotti, S Bartalucci, S Bertolucci, S Di Matteo, Massimiliano Bazzi, A Clozza, Luca De Paolis, A M Bragadireanu, Michael Cargnelli, J P EggerAbstract:The VIolation of Pauli Exclusion Principle -2 experiment, or VIP-2 experiment, at the Laboratori Nazionali del Gran Sasso searches for X-rays from copper atomic transitions that are prohibited by the Pauli Exclusion Principle. Candidate direct violation events come from the transition of a 2p electron to the ground state that is already occupied by two electrons. From the first data taking campaign in 2016 of VIP-2 experiment, we determined a best upper limit of \(3.4~\times ~10^{-29}\) for the probability that such a violation exists. Significant improvement in the control of the experimental systematics was also achieved, although not explicitly reflected in the improved upper limit. By introducing a simultaneous spectral fit of the signal and background data in the analysis, we succeeded in taking into account systematic errors that could not be evaluated previously in this type of measurements.
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experimental search for the violation of pauli Exclusion Principle
arXiv: Atomic Physics, 2018Co-Authors: E Milotti, S Bartalucci, S Bertolucci, S Di Matteo, Massimiliano Bazzi, A Clozza, Luca De Paolis, A M Bragadireanu, Michael Cargnelli, J P EggerAbstract:The VIolation of Pauli Exclusion Principle -2 experiment, or VIP-2 experiment, at the Laboratori Nazionali del Gran Sasso searches for x-rays from copper atomic transition that are prohibited by the Pauli Exclusion Principle. Candidate direct violation events come from the transition of a $2p$ electron to the ground state that is already occupied by two electrons. From the first data taking campaign in 2016 of VIP-2 experiment, we determined a best upper limit of 3.4 $\times$ 10$^{-29}$ for the probability that such a violation exists. Significant improvement in the control of the experimental systematics was also achieved, although not explicitly reflected in the improved upper limit. By introducing a simultaneous spectral fit of the signal and background data in the analysis, we succeeded in taking into account systematic errors that could not be evaluated previously in this type of measurements.
S Di Matteo - One of the best experts on this subject based on the ideXlab platform.
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experimental search for the violation of pauli Exclusion Principle vip 2 collaboration
European Physical Journal C, 2018Co-Authors: E Milotti, S Bartalucci, S Bertolucci, S Di Matteo, Massimiliano Bazzi, A Clozza, Luca De Paolis, A M Bragadireanu, Michael Cargnelli, J P EggerAbstract:The VIolation of Pauli Exclusion Principle -2 experiment, or VIP-2 experiment, at the Laboratori Nazionali del Gran Sasso searches for X-rays from copper atomic transitions that are prohibited by the Pauli Exclusion Principle. Candidate direct violation events come from the transition of a 2p electron to the ground state that is already occupied by two electrons. From the first data taking campaign in 2016 of VIP-2 experiment, we determined a best upper limit of \(3.4~\times ~10^{-29}\) for the probability that such a violation exists. Significant improvement in the control of the experimental systematics was also achieved, although not explicitly reflected in the improved upper limit. By introducing a simultaneous spectral fit of the signal and background data in the analysis, we succeeded in taking into account systematic errors that could not be evaluated previously in this type of measurements.
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experimental search for the violation of pauli Exclusion Principle
arXiv: Atomic Physics, 2018Co-Authors: E Milotti, S Bartalucci, S Bertolucci, S Di Matteo, Massimiliano Bazzi, A Clozza, Luca De Paolis, A M Bragadireanu, Michael Cargnelli, J P EggerAbstract:The VIolation of Pauli Exclusion Principle -2 experiment, or VIP-2 experiment, at the Laboratori Nazionali del Gran Sasso searches for x-rays from copper atomic transition that are prohibited by the Pauli Exclusion Principle. Candidate direct violation events come from the transition of a $2p$ electron to the ground state that is already occupied by two electrons. From the first data taking campaign in 2016 of VIP-2 experiment, we determined a best upper limit of 3.4 $\times$ 10$^{-29}$ for the probability that such a violation exists. Significant improvement in the control of the experimental systematics was also achieved, although not explicitly reflected in the improved upper limit. By introducing a simultaneous spectral fit of the signal and background data in the analysis, we succeeded in taking into account systematic errors that could not be evaluated previously in this type of measurements.
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search for the violation of pauli Exclusion Principle at lngs
EPJ Web of Conferences, 2018Co-Authors: S Bartalucci, S Bertolucci, S Di Matteo, Massimiliano Bazzi, A Clozza, Luca De Paolis, A M Bragadireanu, Michael Cargnelli, Catalina Curceanu, J P EggerAbstract:In the VIP (VIolation of Pauli Exclusion Principle) and its follow-up VIP- 2 experiments at the Laboratori Nazionali del Gran Sasso, we test the validity of the Pauli Exclusion Principle, by searching for x-rays from copper atomic transitions from a 2p orbit electron to the ground state which is already occupied by two electrons. Such transitions are prohibited by the Pauli Exclusion Principle. The physics run of the VIP-2 experiment started in late 2016 and will collect data for three years. From the first data taking period of two months we have obtained a new limit better than the VIP result from three years of running. In this article we present the published first physics result from the VIP-2 experiment and discuss about the future perspectives.
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test of the pauli Exclusion Principle in the vip 2 underground experiment
Entropy, 2017Co-Authors: Catalina Curceanu, S Bartalucci, S Bertolucci, C Berucci, M Bragadireanu, Massimiliano Bazzi, A Clozza, Luca De Paolis, Michael Cargnelli, S Di MatteoAbstract: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 transitions that are prohibited by the Pauli Exclusion Principle. The candidate events—if they exist—originate from the transition of a 2 p 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 × 10 − 29 . We report a first result from the VIP-2 experiment improving on the VIP limit, which solidifies the final goal of achieving a two orders of magnitude gain in the long run.
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test of the pauli Exclusion Principle in the vip 2 underground experiment
arXiv: Quantum Physics, 2017Co-Authors: Catalina Curceanu, S Bartalucci, S Bertolucci, C Berucci, A Clozza, Luca De Paolis, A M Bragadireanu, Michael Cargnelli, H Shi, S Di MatteoAbstract: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.
Michael Cargnelli - One of the best experts on this subject based on the ideXlab platform.
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VIP-2 —High-Sensitivity Tests on the Pauli Exclusion Principle for Electrons
Entropy, 2020Co-Authors: Kristian Piscicchia, J Marton, S Bartalucci, S Bertolucci, M Bragadireanu, Massimiliano Bazzi, A Clozza, Michael Cargnelli, Raffaele Del Grande, Luca De PaolisAbstract: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 in 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.
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high precision test of the pauli Exclusion Principle for electrons
Condensed Matter, 2019Co-Authors: Kristian Piscicchia, S Bartalucci, S Bertolucci, M Bragadireanu, Massimiliano Bazzi, A Clozza, Michael Cargnelli, Catalina Curceanu, Abdollah Amirkhani, Raffaele Del GrandeAbstract: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.
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high precision test of the pauli Exclusion Principle for electrons
Condensed Matter, 2019Co-Authors: Kristian Piscicchia, S Bartalucci, S Bertolucci, M Bragadireanu, Massimiliano Bazzi, A Clozza, Michael Cargnelli, Catalina Curceanu, Abdollah Amirkhani, Raffaele Del GrandeAbstract: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.
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experimental search for the violation of pauli Exclusion Principle vip 2 collaboration
European Physical Journal C, 2018Co-Authors: E Milotti, S Bartalucci, S Bertolucci, S Di Matteo, Massimiliano Bazzi, A Clozza, Luca De Paolis, A M Bragadireanu, Michael Cargnelli, J P EggerAbstract:The VIolation of Pauli Exclusion Principle -2 experiment, or VIP-2 experiment, at the Laboratori Nazionali del Gran Sasso searches for X-rays from copper atomic transitions that are prohibited by the Pauli Exclusion Principle. Candidate direct violation events come from the transition of a 2p electron to the ground state that is already occupied by two electrons. From the first data taking campaign in 2016 of VIP-2 experiment, we determined a best upper limit of \(3.4~\times ~10^{-29}\) for the probability that such a violation exists. Significant improvement in the control of the experimental systematics was also achieved, although not explicitly reflected in the improved upper limit. By introducing a simultaneous spectral fit of the signal and background data in the analysis, we succeeded in taking into account systematic errors that could not be evaluated previously in this type of measurements.
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experimental search for the violation of pauli Exclusion Principle
arXiv: Atomic Physics, 2018Co-Authors: E Milotti, S Bartalucci, S Bertolucci, S Di Matteo, Massimiliano Bazzi, A Clozza, Luca De Paolis, A M Bragadireanu, Michael Cargnelli, J P EggerAbstract:The VIolation of Pauli Exclusion Principle -2 experiment, or VIP-2 experiment, at the Laboratori Nazionali del Gran Sasso searches for x-rays from copper atomic transition that are prohibited by the Pauli Exclusion Principle. Candidate direct violation events come from the transition of a $2p$ electron to the ground state that is already occupied by two electrons. From the first data taking campaign in 2016 of VIP-2 experiment, we determined a best upper limit of 3.4 $\times$ 10$^{-29}$ for the probability that such a violation exists. Significant improvement in the control of the experimental systematics was also achieved, although not explicitly reflected in the improved upper limit. By introducing a simultaneous spectral fit of the signal and background data in the analysis, we succeeded in taking into account systematic errors that could not be evaluated previously in this type of measurements.
S Bertolucci - One of the best experts on this subject based on the ideXlab platform.
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VIP-2 —High-Sensitivity Tests on the Pauli Exclusion Principle for Electrons
Entropy, 2020Co-Authors: Kristian Piscicchia, J Marton, S Bartalucci, S Bertolucci, M Bragadireanu, Massimiliano Bazzi, A Clozza, Michael Cargnelli, Raffaele Del Grande, Luca De PaolisAbstract: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 in 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.
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high precision test of the pauli Exclusion Principle for electrons
Condensed Matter, 2019Co-Authors: Kristian Piscicchia, S Bartalucci, S Bertolucci, M Bragadireanu, Massimiliano Bazzi, A Clozza, Michael Cargnelli, Catalina Curceanu, Abdollah Amirkhani, Raffaele Del GrandeAbstract: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.
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high precision test of the pauli Exclusion Principle for electrons
Condensed Matter, 2019Co-Authors: Kristian Piscicchia, S Bartalucci, S Bertolucci, M Bragadireanu, Massimiliano Bazzi, A Clozza, Michael Cargnelli, Catalina Curceanu, Abdollah Amirkhani, Raffaele Del GrandeAbstract: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.
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experimental search for the violation of pauli Exclusion Principle vip 2 collaboration
European Physical Journal C, 2018Co-Authors: E Milotti, S Bartalucci, S Bertolucci, S Di Matteo, Massimiliano Bazzi, A Clozza, Luca De Paolis, A M Bragadireanu, Michael Cargnelli, J P EggerAbstract:The VIolation of Pauli Exclusion Principle -2 experiment, or VIP-2 experiment, at the Laboratori Nazionali del Gran Sasso searches for X-rays from copper atomic transitions that are prohibited by the Pauli Exclusion Principle. Candidate direct violation events come from the transition of a 2p electron to the ground state that is already occupied by two electrons. From the first data taking campaign in 2016 of VIP-2 experiment, we determined a best upper limit of \(3.4~\times ~10^{-29}\) for the probability that such a violation exists. Significant improvement in the control of the experimental systematics was also achieved, although not explicitly reflected in the improved upper limit. By introducing a simultaneous spectral fit of the signal and background data in the analysis, we succeeded in taking into account systematic errors that could not be evaluated previously in this type of measurements.
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experimental search for the violation of pauli Exclusion Principle
arXiv: Atomic Physics, 2018Co-Authors: E Milotti, S Bartalucci, S Bertolucci, S Di Matteo, Massimiliano Bazzi, A Clozza, Luca De Paolis, A M Bragadireanu, Michael Cargnelli, J P EggerAbstract:The VIolation of Pauli Exclusion Principle -2 experiment, or VIP-2 experiment, at the Laboratori Nazionali del Gran Sasso searches for x-rays from copper atomic transition that are prohibited by the Pauli Exclusion Principle. Candidate direct violation events come from the transition of a $2p$ electron to the ground state that is already occupied by two electrons. From the first data taking campaign in 2016 of VIP-2 experiment, we determined a best upper limit of 3.4 $\times$ 10$^{-29}$ for the probability that such a violation exists. Significant improvement in the control of the experimental systematics was also achieved, although not explicitly reflected in the improved upper limit. By introducing a simultaneous spectral fit of the signal and background data in the analysis, we succeeded in taking into account systematic errors that could not be evaluated previously in this type of measurements.
Catalina Curceanu - One of the best experts on this subject based on the ideXlab platform.
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high precision test of the pauli Exclusion Principle for electrons
Condensed Matter, 2019Co-Authors: Kristian Piscicchia, S Bartalucci, S Bertolucci, M Bragadireanu, Massimiliano Bazzi, A Clozza, Michael Cargnelli, Catalina Curceanu, Abdollah Amirkhani, Raffaele Del GrandeAbstract: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.
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high precision test of the pauli Exclusion Principle for electrons
Condensed Matter, 2019Co-Authors: Kristian Piscicchia, S Bartalucci, S Bertolucci, M Bragadireanu, Massimiliano Bazzi, A Clozza, Michael Cargnelli, Catalina Curceanu, Abdollah Amirkhani, Raffaele Del GrandeAbstract: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.
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search for the violation of pauli Exclusion Principle at lngs
EPJ Web of Conferences, 2018Co-Authors: S Bartalucci, S Bertolucci, S Di Matteo, Massimiliano Bazzi, A Clozza, Luca De Paolis, A M Bragadireanu, Michael Cargnelli, Catalina Curceanu, J P EggerAbstract:In the VIP (VIolation of Pauli Exclusion Principle) and its follow-up VIP- 2 experiments at the Laboratori Nazionali del Gran Sasso, we test the validity of the Pauli Exclusion Principle, by searching for x-rays from copper atomic transitions from a 2p orbit electron to the ground state which is already occupied by two electrons. Such transitions are prohibited by the Pauli Exclusion Principle. The physics run of the VIP-2 experiment started in late 2016 and will collect data for three years. From the first data taking period of two months we have obtained a new limit better than the VIP result from three years of running. In this article we present the published first physics result from the VIP-2 experiment and discuss about the future perspectives.
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Search for the violation of Pauli Exclusion Principle at LNGS
2017Co-Authors: H Shi, S Bartalucci, S Bertolucci, Massimiliano Bazzi, A Clozza, Luca De Paolis, A M Bragadireanu, Michael Cargnelli, Catalina Curceanu, Sergio Di MatteoAbstract:In the VIP (VIolation of Pauli Exclusion Principle) and its follow-up VIP-2 experiments at the Laboratori Nazionali del Gran Sasso, we test the validity of the Pauli Exclusion Principle, by searching for x-rays from copper atomic transitions from a 2p orbit electron to the ground state which is already occupied by two electrons. Such transitions are prohibited by the Pauli Exclusion Principle. The physics run of the VIP-2 experiment started in late 2016 and will collect data for three years. From the first data taking period of two months we have obtained a new limit better than the VIP result from three years of running. In this article we present the published first physics result from the VIP-2 experiment and discuss about the future perspectives. © The Authors, published by EDP Sciences.
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test of the pauli Exclusion Principle in the vip 2 underground experiment
Entropy, 2017Co-Authors: Catalina Curceanu, S Bartalucci, S Bertolucci, C Berucci, M Bragadireanu, Massimiliano Bazzi, A Clozza, Luca De Paolis, Michael Cargnelli, S Di MatteoAbstract: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 transitions that are prohibited by the Pauli Exclusion Principle. The candidate events—if they exist—originate from the transition of a 2 p 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 × 10 − 29 . We report a first result from the VIP-2 experiment improving on the VIP limit, which solidifies the final goal of achieving a two orders of magnitude gain in the long run.