Relatore
Hexi Shi
(L)
Descrizione
Stefan-Meyer-Institut fur Subatomare Physik, Boltzmanngasse 3, 1090 Wien, Austria A,
INFN, Laboratori Nazionali di Frascati, C.P. 13, Via E. Fermi 40, I-00044 Frascati(Roma), Italy B,
CERN, CH-1211, Geneva 23, Switzerland C,
IFIN-HH, Institutul National pentru Fizica si Inginerie Nucleara Horia Hulubbei, Reactorului 30,
Magurele, Romania D,
Museo Storic della Fisica e Centro Studi e Ricerche Enrico Fermi, Piazza del Viminale 1,
00183 Roma, Italy E,
Institut de Physique UMR CNRS-UR1 6251, Universite de Rennes1, F-35042 Rennes, France F,
Institut de Physique, Universite de Neuch^atel, 1 rue A.-L. Breguet, CH-2000 Neuch^atel, Switzerland G,
Laboratori Nazionali del Gran Sasso, S.S. 17/bis, I-67010 Assergi (AQ), Italy H,
Dipartimento di Fisica, Universita di Trieste and INFN-Sezione di Trieste, Via Valerio, 2,
I-34127 Trieste, Italy I,
Universidade de Santiago de Compostela, Casas Reais 8, 15782 Santiago de Compostela, Spain J,
Excellence Cluster Universe, Technische Universitat Munchen, Boltzmannstrae 2,
D-85748 Garching, Germany K.
H. Shi A, S. Bartalucci B, S. Bertolucci C, C. Berucci A ;B, A.M. Bragadireanu B ;D, M. Cargnelli A,
A. Clozza B, C. Curceanu B ;D ;E, L. De Paolis B, S. Di Matteo F, A. d'Uzi B, J.-P, Egger G,
C. Guaraldo B, M. Iliescu B ;F, T. Ishiwatari A, J. Marton A, M. Laubenstein H, E. Milotti I,
D. Pietreanu B ;D, K. Piscicchia E, T. Ponta D, A. Romero Vidal K, E. Sbardella B, A. Scordo B,
D.L. Sirghi B ;D, F. Sirghi B ;D, L. Sperandio B, O. Vazquez Doce J, E. Widmann A, J. Zmeskal A
Formulated by Wolfgang Pauli in 1925 [1], the Pauli Exclusion Principle (PEP) has been the
foundation for our understanding of all the elds of physics where many-fermion systems are
concerned. Since no simple explanation for the principle exists, it remains to be a postulate
open to experimental tests, which are dicult as there is no well-established theory to clearly
quantify a possible small amount of violation.
However there have been high precision experiments that search for possible small violation
of PEP in the framework of Quantum Mechenics. In the rst of such experiments, Ramberg
and Snow [2] supplied electric current to a Cu target, and searched for PEP violating atomic
transitions of the \fresh" electrons from the current. The result for the non-exsistence of the
anomalous X-rays from such transitions then set the upper limit for the probability that PEP
can be violated. Following this method, the VIP (VIolation of Pauli Exclusion Principle)
experiment improved the sensitivity due to eective background reduction, by performing the
measurement at the Gran Sasso underground laboratory (LNGS), and set an upper limit at
the level of 1029 [3,4], for the probability that an external electron captured by a Cu atom
can de-excite to the 1s state already occupied by two electrons.
In this talk, topics mentioned above will be discussed in detail. The prepartion for our
follow-up experiment planned at Gran Sasso[5], aiming to increase the sensitivity by two orders of magnitude, will also be introduced.
[1] W. Pauli, Z. Phys. 31, 765(1925);
[2] E. Ramberg and G.A. Snow, Phys. Lett. B238, 438{441(1990);
[3] S. Bartalucci, et al:, Phys. Lett. B641, 18{22(2006);
[4] C. Curceanu, et al:, AIP Conf. Proc. 1508, 136(2012); doi: 10.1063/1.4773125;
[5] J. Marton, et al:, J. Phys.: Conf. Ser. 447, (2013)012070
