Atmospheric axionlike particles at Super-Kamiokande

被引：8

作者：

Cheung, Kingman ^{[1
,2
,3
]}

Kuo, Jui-Lin ^{[4
]}

Tseng, Po-Yan ^{[1
,2
]}

Wang, Zeren Simon ^{[1
,2
]}

机构：

[1] Natl Tsing Hua Univ, Dept Phys, Hsinchu 300, Taiwan

[2] Natl Tsing Hua Univ, Ctr Theory & Computat, Hsinchu 300, Taiwan

[3] Konkuk Univ, Sch Phys, Div Quantum Phases & Devices, Seoul 143701, South Korea

[4] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA

来源：

PHYSICAL REVIEW D | 2022年 / 106卷 / 09期

基金：

美国国家科学基金会;

关键词：

CP CONSERVATION; UNIFICATION;

D O I：

10.1103/PhysRevD.106.095029

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We consider a muonphilic axionlike particle (ALP), denoted as a, lighter than twice the muon mass. ALPs of this mass range dominantly decay into a pair of photons, induced by a triangular muon loop. Such light muonphilic ALPs are naturally long lived. At the atmosphere, the ALPs are copiously produced from charged-meson decays in air showers, such as pi(+/-) -> mu(+/-)va, via the ALP-muon coupling g(a)(mu mu). After propagating tens of kilometers, the ALPs decay with a -> gamma gamma inside large-volume Cherenkov detectors near Earth's surface, such as Super-Kamiokande (SK). We find the present SK observation constrains on muonphilic ALPs of mass range [1 MeV, 30 MeV] and ALP-muon coupling [10(-3),10(2)], assuming the proper decay length c tau(a) in [10(-3) km, 10(6) km] either dependent on or independent of g(a)(mu mu). We conclude that atmospheric searches of such exotic states can be complementary to collider and beam-dump experiments as well as astrophysical probes.

引用

页数：8

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