Distinctive nuclear signatures of low-energy atmospheric neutrinos

被引：6

作者：

Suliga, Anna M. ^{[1
,2
]}

Beacom, John F. ^{[3
,4
,5
]}

机构：

[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[2] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA

[3] Ohio State Univ, Ctr Cosmol & AstroParticle Phys CCAPP, Columbus, OH 43210 USA

[4] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA

[5] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA

来源：

PHYSICAL REVIEW D | 2023年 / 108卷 / 04期

基金：

美国国家科学基金会;

关键词：

MUON-CAPTURE; SOLAR NEUTRINOS; CROSS-SECTIONS; A=12 NUCLEI; C-12; OSCILLATIONS; SCATTERING; FLUX; WEAK; ANTINEUTRINOS;

D O I：

10.1103/PhysRevD.108.043035

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

New probes of neutrino mixing are needed to advance precision studies. One promising direction is via the detection of low-energy atmospheric neutrinos (below a few hundred MeV), to which a variety of near -term experiments will have much-improved sensitivity. Here we focus on probing these neutrinos through distinctive nuclear signatures of exclusive neutrino-carbon interactions-those that lead to detectable nuclear-decay signals with low backgrounds-in both neutral-current and charged-current channels. The neutral-current signature is a line at 15.11 MeV and the charged-current signatures are two or threefold coincidences with delayed decays. We calculate the prospects for identifying such events in the Jiangmen Underground Neutrino Observatory (JUNO), a large-scale liquid-scintillator detector. A five-year exposure would yield about 16 neutral-current events (all flavors) and about 16 charged-current events (mostly from ve + v over bar e, with some from vo + v over bar o), and thus roughly 25% uncertainties on each of their rates. Our results show the potential of JUNO to make the first identified measurement of sub-100 MeV atmospheric neutrinos. They also are a step towards multi-detector studies of low-energy atmospheric neutrinos, with the goal of identifying additional distinctive nuclear signatures for carbon and other targets.

引用

页数：14

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