218 articles – 617 Notices  [english version]
 HAL : in2p3-00022181, version 1
 arXiv : hep-ph/0406252
 European Physical Journal C 37 (2004) 421-431
 New experimental limits on violations of the Pauli exclusion principle obtained with the Borexino counting test facility
 Borexino Collaboration(s)
 (2004)
 The Pauli exclusion principle (PEP) has been tested for nucleons ($n,p$) in $^{12}C$ and $^{16}O$ 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 1$P$- shell nucleons to the filled 1$S_{1/2}$ 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: $\tau(^{12}C\to^{12}\widetilde{C}+\gamma) > 2.1\cdot10^{27}$ y, $\tau(^{12}C\to^{11}\widetilde{B}+ p) > 5.0\cdot10^{26}$ y, $\tau(^{12}C(^{16}O)\to^{11}\widetilde{C}(^{15}\widetilde{O})+ n) > 3.7 \cdot 10^{26}$ y, $\tau(^{12}C\to^{8}\widetilde{Be}+\alpha) > 6.1 \cdot 10^{23}$ y, $\tau(^{12}C\to^{12}\widetilde{N}+ e^- + \widetilde{\nu_e})> 7.6 \cdot 10^{27}$ y and $\tau(^{12}C\to^{12}\widetilde{B}+ e^+ + \nu_e)> 7.7 \cdot 10^{27}$ y, all at 90% C.L.
 Lien vers le texte intégral : http://fr.arXiv.org/abs/hep-ph/0406252
 in2p3-00022181, version 1 http://hal.in2p3.fr/in2p3-00022181 oai:hal.in2p3.fr:in2p3-00022181 Contributeur : Simone Lantz <> Soumis le : Mardi 31 Août 2004, 14:26:20 Dernière modification le : Lundi 24 Octobre 2005, 17:22:32