Enhanced tau neutrino appearance through invisible decay

被引：8

作者：

Pagliaroli, Giulia ^{[1
]}

Di Marco, Natalia ^{[2
]}

Mannarelli, Massimo ^{[2
]}

机构：

[1] Gran Sasso Sci Inst, Viale Francesco Crispi 7, I-67100 Laquila, AQ, Italy

[2] Ist Nazl Fis Nucl, Lab Nazl Gran Sasso, Via G Acitelli 22, I-67100 Assergi, AQ, Italy

来源：

PHYSICAL REVIEW D | 2016年 / 93卷 / 11期

关键词：

SUPERNOVA; 1987A; BURST;

D O I：

10.1103/PhysRevD.93.113011

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The decay of neutrino mass eigenstates leads to a change of the conversion and survival probability of neutrino flavor eigenstates. Exploiting the recent results released by the long-baseline OPERA experiment we perform the statistical investigation of the neutrino invisible decay hypothesis in the nu(mu) -> nu(tau) appearance channel. We find that the neutrino decay provides an enhancement of the expected tau appearance signal with respect to the standard oscillation scenario for the long-baseline OPERA experiment. The increase of the nu(mu) -> nu(tau) conversion probability by the decay of one of the mass eigenstates is due to a reduction of the "destructive interference" among the different massive neutrino components. Despite data showing a very mild preference for invisible decays with respect to the oscillations only hypothesis, we provide an upper limit for the neutrino decay lifetime in this channel of tau(3)/m(3)greater than or similar to 1.3x10(-13) s/eV at the 90% confidence level.

引用

页数：5