Improvements on perturbative oscillation formulas including non-standard neutrino interactions

Autor(es)

Chaves, M. E. ^{[1, 2, 3]} ; Gratieri, D. R. ^{[1, 4]} ; Peres, O. L. G. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083859 Campinas, SP - Brazil

^[2] Univ Fed Fluminense, Inst Fis, BR-24210310 Niteroi, RJ - Brazil

^[3] UFF, Inst Ciencias Exatas, BR-27213145 Volta Redonda, RJ - Brazil

^[4] UFF, Escola Engn Ind Met Volta Redonda, BR-27225125 Volta Redonda, RJ - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS; v. 48, n. 1 JAN 2021.
• Citações Web of Science: 0

Resumo

We use perturbation theory to obtain neutrino oscillation probabilities, including the standard mass-mixing paradigm and non-standard neutrino interactions (NSI). The perturbation is made on the standard parameters Delta m212/Delta m312<i and sin(2)(theta(13)) and on the non-diagonal NSI parameters, but keeps diagonal NSI parameters non-perturbated. We perform the calculation for the channels nu(mu) -> nu(e) and nu(mu) -> nu(mu). The resulting oscillation formulas are compact and present functional structure similar to the standard oscillation (SO) case. They apply to a wide range in the allowed NSI space of parameters and include the previous results from perturbative approaches as limit cases. Also, we use the compact formulas we found to explain the origin of the degeneracies in the neutrino probabilities in terms of the invariance of amplitude and phase of oscillations. Then we determine analytically the multiple sets of combinations of SO and NSI parameters that result in oscillation probabilities identical to the SO case. (AU)

• Processo FAPESP: 14/19164-6 - Desafios para o século XXI em física e astrofísica de neutrinos
• Beneficiário: Orlando Luis Goulart Peres
• Modalidade de apoio: Auxílio à Pesquisa - Projetos Especiais