论文标题
超级kamiokande处的大气轴状颗粒
Atmospheric axion-like particles at Super-Kamiokande
论文作者
论文摘要
我们认为一个类似肌轴轴的粒子（ALP），称为$ a $，比MUON质量轻的两倍。该质量范围的阿尔卑斯山主要腐烂成一对光子，由三角臂循环诱导。这种轻度的muonphilic阿尔卑斯山自然是长寿的。在大气中，阿尔卑斯山是在空中阵雨中通过带电的膜衰减产生的，例如$π^\ pm \toμ^\ pmνa$，通过alp-muon耦合$ g_ {aμμ} $。在传播了数十公里后，阿尔卑斯山在大容量的Cherenkov探测器内，在地球表面附近的大容量Cherenkov探测器（例如Super-Kamiokande（SK））内衰减。 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 $cτ_a$ in [$10^{-3}$ km, $10^6$ km] either dependent on or independent of $g_{aμμ}$.我们得出的结论是，对这种外来状态的大气搜索可以与对撞机和横梁降落实验以及天体物理探针相辅相成。
We consider a muonphilic axion-like-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 $π^\pm \to μ^\pm νa$, via the ALP-muon coupling $g_{aμμ}$. After propagating tens of kilometers, the ALPs decay with $a\to γγ$ inside large-volume Cherenkov detectors near the 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 $cτ_a$ in [$10^{-3}$ km, $10^6$ km] either dependent on or independent of $g_{aμμ}$. We conclude that atmospheric searches of such exotic states can be complementary to collider and beam-dump experiments as well as astrophysical probes.
