Test of the electric charge conservation law with Borexino detector

International Conference on Particle Physics and Astrophysics

Vishneva, A.^1 ; Agostini, M.^2 ; Appel, S.^2 ; Bellini, G.^3 ; Benziger, J.^4 ; Bick, D.^5 ; Bonfini, G.^6 ; Bravo, D.^7 ; Caccianiga, B.^3 ; Calaprice, F.^8 ; Caminata, A.^9 ; Cavalcante, P.^6 ; Chepurnov, A.^10 ; Angelo, D.D.^3 ; Davini, S.^11 ; Derbin, A.^12 ; Noto, L Di^9 ; Drachnev, I.^11 ; Etenko, A.^13 ; Fomenko, K.^1 ; Franco, D.^14 ; Gabriele, F.^6 ; Galbiati, C.^8 ; Ghiano, C.^9 ; Giammarchi, M.^3 ; Goeger-Neff, M.^2 ; Goretti, A.^8 ; Gromov, M.^10 ; Hagner, C.^5 ; Hungerford, E.^15 ; Ianni, Aldo^6 ; Ianni, Andrea^8 ; Jedrzejczak, K.^16 ; Kaiser, M.^5 ; Kobychev, V.^18 ; Korablev, D.^1 ; Korga, G.^6 ; Kryn, D.^14 ; Laubenstein, M.^6 ; Lehnert, B.^18 ; Litvinovich, E.^13,19 ; Lombardi, F.^6 ; Lombardi, P.^3 ; Ludhova, L.^3 ; Lukyanchenko, G.^13,19 ; Machulin, I.^13,19 ; Manecki, S.^7 ; Maneschg, W.^20 ; Marcocci, S.^11 ; Meroni, E.^3 ; Meyer, M.^5 ; Miramonti, L.^3 ; Misiaszek, M.^6,16 ; Montuschi, M.^21 ; Mosteiro, P.^8 ; Muratova, V.^12 ; Neumair, B.^2 ; Oberauer, L.^2 ; Obolensky, M.^14 ; Ortica, F.^24 ; Pallavicini, M.^9 ; Papp, L.^2 ; Perasso, L.^9 ; Pocar, A.^23 ; Ranucci, G.^3 ; Razeto, A.^6 ; Re, A.^3 ; Romani, A.^22 ; Roncin, R.^6,14 ; Rossi, N.^6 ; Schonert, S.^2 ; Semenov, D.^12 ; Simgen, H.^20 ; Skorokhvatov, M.^13,19 ; Smirnov, O.^1 ; Sotnikov, A.^1 ; Sukhotin, S.^13 ; Suvorov, Y.^13,24 ; Tartaglia, R.^6 ; Testera, G.^9 ; Thurn, J.^18 ; Toropova, M.^13 ; Unzhakov, E.^12 ; Vogelaar, R.B.^7 ; Von Feilitzsch, F.^2 ; Wang, H.^24 ; Weinz, S.^24 ; Winter, J.^24 ; Wojcik, M.^16 ; Wurm, M.^24 ; Yokley, Z.^7 ; Zaimidoroga, O.^1 ; Zavatarelli, S.^9 ; Zuber, K.^17 ; Zuzel, G.^16

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;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/675/1/012025/pdf
DOI  :  10.1088/1742-6596/675/1/012025

来源: IOP

【 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.