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New experimental limits on violations of the Pauli exclusion principle obtained with the Borexino Counting Test Facility

Abstract.

The Pauli exclusion principle (PEP) has been tested for nucleons (n,p) in \({}^{12}{\rm C}\) and \({}^{16}{\rm O}\) nuclei, using the results of background measurements with the prototype of the Borexino detector, the Counting Test Facility (CTF). The approach consisted of a search for \(\gamma\), n, p and/or \(\alpha\)’s emitted in a non-Paulian transition of 1P- shell nucleons to the filled 1S 1/2 shell in nuclei. Similarly, the Pauli-forbidden \(\beta^{\pm}\) decay processes were searched for. Due to the extremely low background and the large mass (4.2 tons) of the CTF detector, the following most stringent up-to-date experimental bounds on PEP violating transitions of nucleons have been established: \(\tau({}^{12}{\rm C} \rightarrow {}^{12}{\rm\widetilde C} + \gamma) > 2.1\cdot10^{27} \mathrm y\), \(\tau({}^{12}{\rm C} \rightarrow {}^{11}{\rm\widetilde B} + p) > 5.0\cdot10^{26} {\mathrm{y}}\), \(\tau({}^{12}{\rm C} ({}^{16}{\rm O}) \rightarrow {}^{11}{\rm\widetilde C} ({}^{15}{\rm\widetilde O} ) + n) > 3.7 \cdot 10^{26} {\mathrm{y}}\), \(\tau({}^{12}{\rm C} \rightarrow {}^{8}{\rm\widetilde{Be}} + \alpha) > 6.1 \cdot 10^{23} \mathrm y\), \(\tau({}^{12}{\rm C} \rightarrow {}^{12}{\rm\widetilde N} + e^- + \widetilde{\nu_e}) > 7.6 \cdot 10^{27} \mathrm y\) and \(\tau({}^{12}{\rm C} \rightarrow {}^{12}{\rm\widetilde B} + e^ + + \nu_e) > 7.7 \cdot 10^{27} \mathrm y\), all at \(90 \%\) C.L.

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Correspondence to A. Derbin.

Additional information

Received: 18 June 2004, Published online: 1 October 2004

PACS:

11.30.-j, 24.80. + y, 23.20.-g, 27.20. + n

G. Bellini: Spokesman

L. Cadonati: Now at Massachusetts Institute of Technology, NW17-161, 175 Albany St. Cambridge, MA 02139

O. Dadoun: Marie Curie fellowship at LNGS

Correspondence to: A. Derbin. On leave of absence from St. Petersburg Nuclear Physics Inst. - Gatchina, Russia

M. Deutsch: Deceased

R. Ford: No w at Sudbury Neutrino Observatory, INCO Creighton Mine, P.O.Box 159 Lively, Ontario, Canada, P3Y 1M3

B. Freudiger: Marie Curie fellowship at LNGS. Now at Institute for Nuclear Physics, Forschungszentrum Karlsruhe, Postfach 3640, 76021 Karlsruhe

S. Gazzana: GLIMOS

V.V. Kobychev: Now at Institute for Nuclear Research, Prospekt Nauki 47, MSP 03680, Kiev, Ukraine

G. Korga: On leave of absence from KFKI-RMKI, Konkoly Thege ut 29-33 H-1121 Budapest, Hungary

C. Lendvai: Marie Curie fellowship at LNGS

P. Lombardi: Detector installation manager

A. Martemianov: Deceased

V. Muratova: On leave of absence from St. Petersburg Nuclear Physics Inst. - Gatchina, Russia

L. Niedermeier: Marie Curie fellowship at LNGS

L. Papp: On leave of absence from KFKI-RMKI, Konkoly Thege ut 29-33 H-1121 Budapest, Hungary

R.S. Raghavan: Present Address: Department of Physics, Virginia Polytechnic Institute and State University, Blacksburg VA 24061

G. Ranucci: Project manager

C. Salvo: Operational manager

Correspondence to: O. Smirnov

A. Sonnenschein: Center for Cosmological Physics, University of Chicago, 933 E.56th St., Chicago, IL 60637

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Back, H.O., Balata, M., de Bari, A. et al. New experimental limits on violations of the Pauli exclusion principle obtained with the Borexino Counting Test Facility. Eur. Phys. J. C 37, 421–431 (2004). https://doi.org/10.1140/epjc/s2004-01991-1

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  • DOI: https://doi.org/10.1140/epjc/s2004-01991-1

Keywords

  • Field Theory
  • Elementary Particle
  • Quantum Field Theory
  • Large Mass
  • Particle Acceleration