Search for a remnant violation of the Pauli exclusion principle in a Roman lead target
Kristian Piscicchia (Centro Fermi-Museo Storico della Fisica e Centro Studi e Ricerche “Enrico Fermi”, Rome, 00184, Italy, INFN-Laboratori Nazionali di Frascati, Via Enrico Fermi 40, Frascati, 00044, Italy); Edoardo Milotti (Dipartimento di Fisica, Università di Trieste and INFN-Sezione di Trieste, Trieste, Italy); Aidin Amirkhani (Politecnico di Milano, Dipartimento di Elettronica, Informazione e Bioingegneria and INFN Sezione di Milano, Milan, Italy); Sergio Bartalucci (INFN-Laboratori Nazionali di Frascati, Via Enrico Fermi 40, Frascati, 00044, Italy); Sergio Bertolucci (Dipartimento di Fisica e Astronomia, Università di Bologna, Bologna, Italy); et al - Show all 28 authors
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.
