Understanding the detector behavior through Montecarlo and calibration studies in view of the SOX measurement

[摘要] Borexino is an unsegmented neutrino detector operating at LNGS in central Italy. The experiment has shown its performances through its unprecedented accomplishments in the solar and geoneutrino detection. These performances make it an ideal tool to accomplish a state- of-the-art experiment able to test the existence of sterile neutrinos (SOX experiment). For both the solar and the SOX analysis, a good understanding of the detector response is fundamental. Consequently, calibration campaigns with radioactive sources have been performed over the years. The calibration data are of extreme importance to develop an accurate Monte Carlo code. This code is used in all the neutrino analyses. The Borexino-SOX calibration techniques and program and the advances on the detector simulation code in view of the start of the SOX data taking are presented.1

[发布机构] Dipartimento di Fisica, Universitá degli Studi e INFN, Genova; 16146, Italy^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;Commissariat Á l'Énergie Atomique et Aux Énergies Alternatives, Centre de Saclay, IRFU, Gif-sur-Yvette; 91191, France^5;Institut für Experimentalphysik, Universität, Hamburg; 22761, Germany^6;INFN Laboratori Nazionali Del Gran Sasso, Assergi (AQ); 67010, Italy^7;Physics Department, Virginia Polytechnic Institute, State University, Blacksburg; VA; 24061, United States^8;Physics Department, Princeton University, Princeton; NJ; 08544, United States; (10) Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics, Moscow; 119234, Russia; (11) Department of Physics and Astronomy, University of Hawai'i, Honolulu; HI; 96822, United States; (12) Gran Sasso Science Institute (INFN), L'Aquila; 67100, Italy; (13) St. Petersburg Nuclear Physics Institute, NRC Kurchatov Institute, Gatchina; 188350, Russia; (14) Department of Physics, University of Houston, Houston; TX; 77204, United States; (15) NRC Kurchatov Institute, Moscow; 123182, Russia; (16) Joint Institute for Nuclear Research, Dubna; 141980, Russia; (17) AstroParticule et Cosmologie, Université Paris Diderot, CNRS/IN2P3, CEA/IRFU, Observatoire de Paris, Sorbonne Paris Cité, Paris, Cedex; 75205, France; (18) Commissariat Á l'Énergie Atomique et Aux Énergies Alternatives, Centre de Saclay, DEN/DM2S, SEMT/BCCR, Gif-sur-Yvette; 91191, France; (19) M. Smoluchowski Institute of Physics, Jagiellonian University, Krakow; 30059, Poland; (20) Kiev Institute for Nuclear Research, Kiev; 06380, Ukraine; (21) Kepler Center for Astro and Particle Physics, Universität Tübingen, Tübingen; 72076, Germany; (22) Department of Physics, Technische Universität Dresden, Dresden; 01062, Germany; (23) National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Kashirskoe highway 31, Moscow; 115409, Russia; (24) Max-Planck-Institut für Kernphysik, Heidelberg; 69117, Germany; (25) Dipartimento di Fisica e Scienze della Terra Universitá degli Studi di Ferrara e INFN, Via Saragat 1-44122, Ferrara, Italy; (26) Dipartimento di Chimica, Biologia e Biotecnologie, Universita' degli Studi e INFN, Perugia; 06123, Italy; (27) Amherst Center for Fundamental Interactions, Physics Department, University of Massachusetts, Amherst; MA; 01003, United States; (28) Physics and Astronomy Department, University of California Los Angeles (UCLA), Los Angeles; CA; 90095, United States; (29) Institute of Physics and Excellence Cluster PRISMA, Johannes Gutenberg Universität Mainz, Mainz; 55099, Germany; (30) Institute for Theoretical and Experimental Physics, Moscow; 117218, Russia^9

[关键词] Calibration data;Calibration techniques;Detector response;Detector simulations;Monte Carlo codes;Neutrino detectors;Radioactive sources;Sterile neutrinos