Test of the electric charge conservation law with Borexino detector

[摘要] The new limit on the electron lifetime is obtained from data of the Borexino experiment. The expected signal from the e → γν decay mode is a 256 keV photon detected in liquid scintillator. Because of the extremely low radioactive background level in the Borexino detector it was possible to improve the previous measurement by two orders of magnitude.

[发布机构] Joint Institute for Nuclear Research, Dubna; 141980, Russia^1;Physik-Department and Excellence Cluster Universe, Technische Universität München, Garching; 85748, Germany^2;Dipartimento di Fisica, Universitá degli Studi e INFN, Milano; 20133, Italy^3;Chemical Engineering Department, Princeton University, Princeton; NJ; 08544, United States^4;Institut für Experimentalphysik, Universität, Hamburg; 22761, Germany^5;INFN Laboratori Nazionali Del Gran Sasso, Assergi (AQ); 67010, Italy^6;Physics Department, Virginia Polytechnic Institute and State University, Blacksburg; VA; 24061, United States^7;Physics Department, Princeton University, Princeton; NJ; 08544, United States^8;Dipartimento di Fisica, Universitá degli Studi e INFN, Genova; 16146, Italy; (10) Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics, Moscow; 119234, Russia; (11) Gran Sasso Science Institute (INFN), L'AQUILA; 67100, Italy; (12) St. Petersburg Nuclear Physics Institute, NRC Kurchatov Institute, Gatchina; 188350, Russia; (13) NRC Kurchatov Institute, Moscow; 123182, Russia; (14) AstroParticule et Cosmologie, Université Paris Diderot, CNRS/IN2P3, CEA/IRFU, Observatoire de Paris, Sorbonne Paris Cité, Paris, Cedex 13; 75205, France; (15) Department of Physics, University of Houston, Houston; TX; 77204, United States; (16) M. Smoluchowski Institute of Physics, Jagiellonian University, Krakow; 30059, Poland; (17) Department of Physics, Technische Universität Dresden, Dresden; 01062, Germany; (18) National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Kashirskoe highway 31, Moscow; 115409, Russia; (19) Max-Planck-Institut für Kernphysik, Heidelberg; 69117, Germany; (20) Dipartimento di Fisica e Scienze della Terra, Universitá degli Studi di Ferrara e INFN, Via Saragat 1-44122, Ferrara, Italy; (21) Dipartimento di Chimica, Universita e INFN, Perugia; 06123, Italy; (22) Amherst Center for Fundamental Interactions, Physics Department, University of Massachusetts, Amherst; MA; 01003, United States; (23) Physics and Astronomy Department, University of California Los Angeles (UCLA), Los Angeles; CA; 90095, United States; (24) Institute of Physics and Excellence Cluster PRISMA, Johannes Gutenberg-Universität Mainz, Mainz; 55099, Germany^9

[关键词] Background level;Borexino detectors;Charge conservation;Decay mode;Electron lifetime;Liquid scintillator;Orders of magnitude