论文标题
通过粒子分布的方位角波动在地面上的方位角波动处的伽马/强体歧视
Gamma/hadron discrimination at high energies through the azimuthal fluctuations of the particle distributions at ground
论文作者
论文摘要
广泛的视野伽玛射线观测站必须与压倒性的宇宙射线背景作斗争，以识别高能量的天体物理伽马射线事件。这项工作引入了一种新颖的伽马/强子区分变量，$ lcm $，该变量量量化了地面粒子分布的方位角不均匀性。由于存在Hadronic子显示器，这种不均匀性在质子诱导的淋浴中比在γ淋浴中更高。然后，讨论了该新变量的歧视能力，作为空气淋浴阵列填充因子的函数，在能源范围内，$ 10 \ $ tev至$ 1 \ $ 1 \，$ pev，并根据基于地面上MUON的MUONS数量的测量而与经典的Gamma/Hadron歧视器进行了比较。获得的结果极为令人鼓舞，为在当前和未来的大型地面伽马射线观测器中使用拟议数量铺平了道路。
Wide field-of-view gamma-ray observatories must fight the overwhelming cosmic ray background to identify very-high-energy astrophysical gamma-ray events. This work introduces a novel gamma/hadron discriminating variable, $LCm$, which quantifies the azimuthal non-uniformity of the particle distributions at the ground. This non-uniformity, due to the presence of hadronic sub-showers, is higher in proton-induced showers than in gamma showers. The discrimination power of this new variable is then discussed, as a function of the air shower array fill factor, in the energy range $10\,$TeV to $1\,$PeV, and compared to the classical gamma/hadron discriminator based on the measurement of the number of muons at the ground. The results obtained are extremely encouraging, paving the way for the use of the proposed quantity in present and future large ground-array gamma-ray observatories.
