Unstable cosmic neutrino capture

被引：10
作者：
Akita, Kensuke [1 ,2 ]
Lambiase, Gaetano [3 ,4 ]
Yamaguchi, Masahide [1 ]
机构：
[1] Tokyo Inst Technol, Dept Phys, Tokyo 1528551, Japan
[2] Inst for Basic Sci Korea, Ctr Theoret Phys Universe, Daejeon 34126, South Korea
[3] Ist Nazl Fis Nucl, Sez Napoli, Grp Collegato Salerno, I-84084 Fisciano, SA, Italy
[4] Univ Salerno, Dipartimento Fis ER Caianiello, I-84084 Fisciano, SA, Italy
来源：
JOURNAL OF HIGH ENERGY PHYSICS | 2022年 / 2022卷 / 02期
关键词：
Neutrino Physics; Cosmology of Theories beyond the SM; Beyond Standard Model; MAGNETIC-MOMENT; DECAYS;
D O I：
10.1007/JHEP02(2022)132
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
Future direct observations of the Cosmic Neutrino Background (CvB) have the potential to explore a neutrino lifetime, especially in the region of the age of the universe, t(0) = 4.35 x 10(17) s. We forecast constraints on neutrino decay via capture of the CvB on tritium, with emphasis on the PTOLEMY-type experiment. In addition, in some cases of invisible neutrino decay into lighter neutrinos in the Standard Model and invisible particles, we can constrain not only the neutrino lifetime but also the masses of the invisible particles. For this purpose, we also formulate the energy spectra of the lighter neutrinos produced by 2-body and 3-body decays, and those of the electrons emitted in the process of the detection of the lighter neutrinos.
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页数：35
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