Autor(es):
Gratieri, Diego Rossi, 1982- ; Guzzo, Marcelo Moraes, 1963- ; Peres, Orlando Luis Goulart, 1969-
Data: 2019
Identificador Persistente: https://hdl.handle.net/20.500.12733/1664579
Origem: Oasisbr
Assunto(s): Oscilações de neutrinos; Interações de neutrinos; Neutrinos atmosféricos; Neutrinos oscillations; Neutrino interactions; Atmospheric neutrinos; Artigo original; Decaimento de neutrinos; Neutrino decay; Proton decay; Oscilações de neutrinos; Oscilações de neutrinos; Interações de neutrinos; Interações de neutrinos; Neutrinos atmosféricos; Neutrinos atmosféricos; Neutrinos oscillations; Neutrinos oscillations; Neutrino interactions; Neutrino interactions; Atmospheric neutrinos; Atmospheric neutrinos; Artigo original; Artigo original; Decaimento de neutrinos; Decaimento de neutrinos; Neutrino decay; Neutrino decay; Proton decay; Proton decay
Descrição
Agradecimentos: We thank M Diwan for the suggestion of this topic. DRG is grateful to E Segreto, LFG Gonzalez, RD de Souza, and VPG Gonçalves for the very enlightening physical discussions. MMG is grateful to FAPESP and CNPq for financial support. OLGP is grateful for the support of FAPESP funding grant 2014/19164-6, and CNPq research fellowship 307269/2013-2 and 304715/2016-6. OLGP and DRG are grateful for partial support from FAEPEX funding grant no. 2391/17. This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Brasil (CAPES) – finance code 001
Abstract: We use atmospheric neutrino phenomenology to obtain the expected background to proton decay in large deep underground neutrino detector (DUNE)-like neutrino detectors. We introduced, for the first time in this kind of analysis, the experimentally confirmed neutrino oscillations of the atmospheric neutrino observations which reduce the corresponding background for the nucleon decay channel p -gt; mu(+) + pi(0) by a factor of 40%. Furthermore, we infer the impact of four systematics on such background: the overall efficiency, the muon reconstruction energy resolution, the resonant neutral pion cross-section, and the neutral pion angular resolution. Considering a 40 kton detector with efficiency of 45%, our analysis leads to an error band in the lower limit for the proton lifetime sensitivity, tau/B, from 7.9 x 10(33) years to 1.1 x 10(34) years at 90% confidence level (C.L.). These numbers can be compared with the current mode-dependent experimental limits tau gt; 10(31) - 10(33) years at 90% C.L
CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ
FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP
COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPES
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