对超高能宇宙线大气簇射中μ子超出的探讨

doi:10.3969/j.issn.1000-5641.2024.03.003

摘要/Abstract

摘要：

近年来, 一些大气簇射观测数据表明, 超高能大气簇射中产生的${\text{μ}}$子数比模型预测的要多, 现有的理论模型都不能很好地解释此现象. 研究指出了, 当超高能宇宙射线与大气粒子发生碰撞时, 可能会发生胶子凝聚, 此时奇异夸克的产生会大大增强, 从而在碎裂产物中产生更多的K介子; 大气簇射的能量更多地分配到强子级联过程, 有可能解释${\text{μ}}$子超出现象.

关键词: ${\text{μ}} $子超出, 胶子凝聚, 奇异夸克

Abstract:

Recently, several air shower observatories established that the number of muons produced in ultrahigh-energy cosmic rays from extensive air-showers is significantly larger than that predicted by models. This study confirms that when ultrahigh-energy cosmic rays scatter on air particles, gluon condensation may occur. At this point, the production of strange quarks is significantly enhanced, such that more kaon will be generated in fragmentation products, and the air shower energy will be further distributed to the hadron cascade, which may explain the muon puzzle.

Key words: muon excess, gluon condensation, strange quark

中图分类号:

O572.25

崔志谊, 吴锦涛, 阮建红. 对超高能宇宙线大气簇射中μ子超出的探讨[J]. 华东师范大学学报（自然科学版）, 2024, 2024(3): 27-35.

Zhiyi CUI, Jintao WU, Jianhong RUAN. Research on the muon excess in ultrahigh-energy cosmic ray of extensive air-showers[J]. Journal of East China Normal University(Natural Science), 2024, 2024(3): 27-35.

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$ {\mathrm{\alpha }}_{\mathrm{s}} $	${{m} }_{\mathrm{s} }/{\rm{MeV} }$	${R}_{\rm{GC}}$	${R}_{\rm{QGP}}$
2.2	280	0.30	0.1
$ 0.6 $	150	0.45	0.3

$k_{\rm{c}}$	R
$k_{\rm{c}}$	${\mu }_{\rm{B}}=1.5\,\mathrm{G}\mathrm{e}\mathrm{V}$	${\mu }_{\rm{B}}=2.0\, \mathrm{G}\mathrm{e}\mathrm{V}$	${\mu }_{\rm{B}}=2.5\, \mathrm{G}\mathrm{e}\mathrm{V}$
$0.50$	1.7	2.8	4.2
$0.65$	1.3	2.0	2.9
$0.80$	1.1	1.6	2.1