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S Bartalucci - One of the best experts on this subject based on the ideXlab platform.

  • search for a remnant violation of the Pauli Exclusion Principle in a roman lead target
    European Physical Journal C, 2020
    Co-Authors: Kristian Piscicchia, S Bartalucci, S Bertolucci, M Bragadireanu, M Cargnelli, Massimiliano Bazzi, A Clozza, E Milotti, A Amirkhani, Raffaele Del Grande
    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.

  • high precision test of the Pauli Exclusion Principle for electrons
    Condensed Matter, 2019
    Co-Authors: Kristian Piscicchia, S Bartalucci, S Bertolucci, M Bragadireanu, M Cargnelli, C Curceanu, Massimiliano Bazzi, A Clozza, A Amirkhani, Raffaele Del Grande
    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.

  • vip2 in lngs testing the Pauli Exclusion Principle for electrons with high sensitivity
    arXiv: Quantum Physics, 2019
    Co-Authors: J Marton, S Bartalucci, S Bertolucci, M Bragadireanu, M Cargnelli, Massimiliano Bazzi, A Clozza, A Amirkhani, A Pichler, C Curceanu
    Abstract:

    The VIP2 (VIolation of the Pauli Exclusion Principle) experiment at the Gran Sasso underground laboratory (LNGS) is searching for possible violations of standard quantum mechanics predictions in atoms at very high sensitivity. We investigate atomic transitions with precision X-ray spectroscopy in order to test the Pauli Exclusion Principle (PEP) and therefore the related spin-statistics theorem. We will present our experimental method for the search for "anomalous" (i.e. Pauli-forbidden) X-ray transitions in copper atoms, produced by "new" electrons, which could have tiny probability to undergo Pauli-forbidden transition to the ground state already occupied by two electrons. We will describe the VIP2 experimental setup, which is taking data at LNGS presently. The goal of VIP2 is to test the PEP for electrons with unprecedented accuracy, down to a limit in the probability that PEP is violated at the level of 10$^{-31}$. We will present current experimental results and discuss implications of a possible violation.

  • experimental search for the violation of Pauli Exclusion Principle vip 2 collaboration
    European Physical Journal C, 2018
    Co-Authors: E Milotti, S Bartalucci, S Bertolucci, M Cargnelli, Massimiliano Bazzi, A Clozza, Luca De Paolis, A M Bragadireanu, S Di Matteo, J P Egger
    Abstract:

    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.

  • experimental search for the violation of Pauli Exclusion Principle
    arXiv: Atomic Physics, 2018
    Co-Authors: E Milotti, S Bartalucci, S Bertolucci, M Cargnelli, Massimiliano Bazzi, A Clozza, Luca De Paolis, A M Bragadireanu, S Di Matteo, J P Egger
    Abstract:

    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.

  • search for a remnant violation of the Pauli Exclusion Principle in a roman lead target
    European Physical Journal C, 2020
    Co-Authors: Kristian Piscicchia, S Bartalucci, S Bertolucci, M Bragadireanu, M Cargnelli, Massimiliano Bazzi, A Clozza, E Milotti, A Amirkhani, Raffaele Del Grande
    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.

  • high precision test of the Pauli Exclusion Principle for electrons
    Condensed Matter, 2019
    Co-Authors: Kristian Piscicchia, S Bartalucci, S Bertolucci, M Bragadireanu, M Cargnelli, C Curceanu, Massimiliano Bazzi, A Clozza, A Amirkhani, Raffaele Del Grande
    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.

  • vip2 in lngs testing the Pauli Exclusion Principle for electrons with high sensitivity
    arXiv: Quantum Physics, 2019
    Co-Authors: J Marton, S Bartalucci, S Bertolucci, M Bragadireanu, M Cargnelli, Massimiliano Bazzi, A Clozza, A Amirkhani, A Pichler, C Curceanu
    Abstract:

    The VIP2 (VIolation of the Pauli Exclusion Principle) experiment at the Gran Sasso underground laboratory (LNGS) is searching for possible violations of standard quantum mechanics predictions in atoms at very high sensitivity. We investigate atomic transitions with precision X-ray spectroscopy in order to test the Pauli Exclusion Principle (PEP) and therefore the related spin-statistics theorem. We will present our experimental method for the search for "anomalous" (i.e. Pauli-forbidden) X-ray transitions in copper atoms, produced by "new" electrons, which could have tiny probability to undergo Pauli-forbidden transition to the ground state already occupied by two electrons. We will describe the VIP2 experimental setup, which is taking data at LNGS presently. The goal of VIP2 is to test the PEP for electrons with unprecedented accuracy, down to a limit in the probability that PEP is violated at the level of 10$^{-31}$. We will present current experimental results and discuss implications of a possible violation.

  • experimental search for the violation of Pauli Exclusion Principle vip 2 collaboration
    European Physical Journal C, 2018
    Co-Authors: E Milotti, S Bartalucci, S Bertolucci, M Cargnelli, Massimiliano Bazzi, A Clozza, Luca De Paolis, A M Bragadireanu, S Di Matteo, J P Egger
    Abstract:

    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.

  • experimental search for the violation of Pauli Exclusion Principle
    arXiv: Atomic Physics, 2018
    Co-Authors: E Milotti, S Bartalucci, S Bertolucci, M Cargnelli, Massimiliano Bazzi, A Clozza, Luca De Paolis, A M Bragadireanu, S Di Matteo, J P Egger
    Abstract:

    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.

M Cargnelli - One of the best experts on this subject based on the ideXlab platform.

  • search for a remnant violation of the Pauli Exclusion Principle in a roman lead target
    European Physical Journal C, 2020
    Co-Authors: Kristian Piscicchia, S Bartalucci, S Bertolucci, M Bragadireanu, M Cargnelli, Massimiliano Bazzi, A Clozza, E Milotti, A Amirkhani, Raffaele Del Grande
    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.

  • high precision test of the Pauli Exclusion Principle for electrons
    Condensed Matter, 2019
    Co-Authors: Kristian Piscicchia, S Bartalucci, S Bertolucci, M Bragadireanu, M Cargnelli, C Curceanu, Massimiliano Bazzi, A Clozza, A Amirkhani, Raffaele Del Grande
    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.

  • vip2 in lngs testing the Pauli Exclusion Principle for electrons with high sensitivity
    arXiv: Quantum Physics, 2019
    Co-Authors: J Marton, S Bartalucci, S Bertolucci, M Bragadireanu, M Cargnelli, Massimiliano Bazzi, A Clozza, A Amirkhani, A Pichler, C Curceanu
    Abstract:

    The VIP2 (VIolation of the Pauli Exclusion Principle) experiment at the Gran Sasso underground laboratory (LNGS) is searching for possible violations of standard quantum mechanics predictions in atoms at very high sensitivity. We investigate atomic transitions with precision X-ray spectroscopy in order to test the Pauli Exclusion Principle (PEP) and therefore the related spin-statistics theorem. We will present our experimental method for the search for "anomalous" (i.e. Pauli-forbidden) X-ray transitions in copper atoms, produced by "new" electrons, which could have tiny probability to undergo Pauli-forbidden transition to the ground state already occupied by two electrons. We will describe the VIP2 experimental setup, which is taking data at LNGS presently. The goal of VIP2 is to test the PEP for electrons with unprecedented accuracy, down to a limit in the probability that PEP is violated at the level of 10$^{-31}$. We will present current experimental results and discuss implications of a possible violation.

  • experimental search for the violation of Pauli Exclusion Principle vip 2 collaboration
    European Physical Journal C, 2018
    Co-Authors: E Milotti, S Bartalucci, S Bertolucci, M Cargnelli, Massimiliano Bazzi, A Clozza, Luca De Paolis, A M Bragadireanu, S Di Matteo, J P Egger
    Abstract:

    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.

  • experimental search for the violation of Pauli Exclusion Principle
    arXiv: Atomic Physics, 2018
    Co-Authors: E Milotti, S Bartalucci, S Bertolucci, M Cargnelli, Massimiliano Bazzi, A Clozza, Luca De Paolis, A M Bragadireanu, S Di Matteo, J P Egger
    Abstract:

    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.

C Curceanu - One of the best experts on this subject based on the ideXlab platform.

  • high precision test of the Pauli Exclusion Principle for electrons
    Condensed Matter, 2019
    Co-Authors: Kristian Piscicchia, S Bartalucci, S Bertolucci, M Bragadireanu, M Cargnelli, C Curceanu, Massimiliano Bazzi, A Clozza, A Amirkhani, Raffaele Del Grande
    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.

  • vip2 in lngs testing the Pauli Exclusion Principle for electrons with high sensitivity
    arXiv: Quantum Physics, 2019
    Co-Authors: J Marton, S Bartalucci, S Bertolucci, M Bragadireanu, M Cargnelli, Massimiliano Bazzi, A Clozza, A Amirkhani, A Pichler, C Curceanu
    Abstract:

    The VIP2 (VIolation of the Pauli Exclusion Principle) experiment at the Gran Sasso underground laboratory (LNGS) is searching for possible violations of standard quantum mechanics predictions in atoms at very high sensitivity. We investigate atomic transitions with precision X-ray spectroscopy in order to test the Pauli Exclusion Principle (PEP) and therefore the related spin-statistics theorem. We will present our experimental method for the search for "anomalous" (i.e. Pauli-forbidden) X-ray transitions in copper atoms, produced by "new" electrons, which could have tiny probability to undergo Pauli-forbidden transition to the ground state already occupied by two electrons. We will describe the VIP2 experimental setup, which is taking data at LNGS presently. The goal of VIP2 is to test the PEP for electrons with unprecedented accuracy, down to a limit in the probability that PEP is violated at the level of 10$^{-31}$. We will present current experimental results and discuss implications of a possible violation.

  • search for the violation of Pauli Exclusion Principle at lngs
    EPJ Web of Conferences, 2018
    Co-Authors: S Bartalucci, S Bertolucci, M Cargnelli, C Curceanu, Massimiliano Bazzi, A Clozza, Luca De Paolis, A M Bragadireanu, S Di Matteo, J P Egger
    Abstract:

    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.

  • test of the Pauli Exclusion Principle in the vip 2 underground experiment
    Entropy, 2017
    Co-Authors: C Curceanu, S Bartalucci, S Bertolucci, C Berucci, M Bragadireanu, M Cargnelli, Massimiliano Bazzi, A Clozza, Luca De Paolis, S Di Matteo
    Abstract:

    The validity of the Pauli Exclusion Principle—a building block of Quantum Mechanics—is tested for electrons. The VIP (violation of Pauli Exclusion Principle) and its follow-up VIP-2 experiments at the Laboratori Nazionali del Gran Sasso search for X-rays from copper atomic 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.

  • vip 2 at lngs an experiment on the validity of the Pauli Exclusion Principle for electrons
    arXiv: Quantum Physics, 2017
    Co-Authors: J Marton, S Bartalucci, S Bertolucci, C Berucci, M Bragadireanu, M Cargnelli, Massimiliano Bazzi, A Clozza, Angelo Bassi, C Curceanu
    Abstract:

    We are experimentally investigating possible violations of standard quantum mechanics predictions in the Gran Sasso underground laboratory in Italy. We test with high precision the Pauli Exclusion Principle and the collapse of the wave function (collapse models). We present our method of searching for possible small violations of the Pauli Exclusion Principle (PEP) for electrons, through the search for anomalous X-ray transitions in copper atoms. These transitions are produced by new electrons (brought inside the copper bar by circulating current) which can have the possibility to undergo Pauli-forbidden transition to the 1s level already occupied by two electrons. We describe the VIP2 (VIolation of the Pauli Exclusion Principle) experimental data taking at the Gran Sasso underground laboratories. The goal of VIP2 is to test the PEP for electrons in agreement with the Messiah-Greenberg superselection rule with unprecedented accuracy, down to a limit in the probability that PEP is violated at the level of 10E-31. We show preliminary experimental results and discuss implications of a possible violation.

S Di Matteo - One of the best experts on this subject based on the ideXlab platform.

  • experimental search for the violation of Pauli Exclusion Principle vip 2 collaboration
    European Physical Journal C, 2018
    Co-Authors: E Milotti, S Bartalucci, S Bertolucci, M Cargnelli, Massimiliano Bazzi, A Clozza, Luca De Paolis, A M Bragadireanu, S Di Matteo, J P Egger
    Abstract:

    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.

  • experimental search for the violation of Pauli Exclusion Principle
    arXiv: Atomic Physics, 2018
    Co-Authors: E Milotti, S Bartalucci, S Bertolucci, M Cargnelli, Massimiliano Bazzi, A Clozza, Luca De Paolis, A M Bragadireanu, S Di Matteo, J P Egger
    Abstract:

    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.

  • search for the violation of Pauli Exclusion Principle at lngs
    EPJ Web of Conferences, 2018
    Co-Authors: S Bartalucci, S Bertolucci, M Cargnelli, C Curceanu, Massimiliano Bazzi, A Clozza, Luca De Paolis, A M Bragadireanu, S Di Matteo, J P Egger
    Abstract:

    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.

  • searches for the violation of Pauli Exclusion Principle at lngs in vip 2 experiment
    arXiv: Instrumentation and Detectors, 2016
    Co-Authors: S Bartalucci, S Bertolucci, C Berucci, M Cargnelli, C Curceanu, A Clozza, Luca De Paolis, A M Bragadireanu, S Di Matteo, A Dufflzi
    Abstract:

    The VIP (Violation of Pauli Exclusion Principle) experiment and its follow-up experiment VIP-2 at the Laboratori Nazionali del Gran Sasso (LNGS) search for X-rays from Cu atomic states that are prohibited by the Pauli Exclusion Principle (PEP). The candidate events, if they exist, will 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 PEP violation for electron is 4.7 ×10–29 set by the VIP experiment. With upgraded detectors for high precision X-ray spectroscopy, the VIP-2 experiment will improve the sensitivity by 2 orders of magnitude.

  • vip 2 experimental tests of the Pauli Exclusion Principle for electrons
    Hyperfine Interactions, 2015
    Co-Authors: A Pichler, S Bartalucci, S Bertolucci, C Berucci, M Bragadireanu, M Cargnelli, C Curceanu, A Clozza, Luca De Paolis, S Di Matteo
    Abstract:

    Many experiments investigated the violation of the Pauli Exclusion Principle (PEP) since its discovery in 1925. The VIP (VIolation of the Pauli Principle) experiment tested the PEP by measuring the probability for an external electron to be captured and undergo a 2p to 1s transition during its cascading process, where the 1s state is already occupied by two electrons. This transition is forbidden by the Pauli Exclusion Principle. The VIP experiment resulted in a preliminary upper limit for the probability of the violation of the PEP of 4.7×10−29. Currently a setup for the follow-up experiment VIP 2 is under preparation. The goal of this experiment is to improve the upper limit for the violation of the PEP by two orders of magnitude, by different improvements like enhanced energy resolution of the X-ray detectors and by implementing an active shielding. Here we report currently ongoing performance tests of the new parts of the setup.