arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1111.6675astro-ph.HEhep-ph
收藏

cosmic-ray核子能谱与大气μ介子荷电比

Spectrum of cosmic-ray nucleons and the atmospheric muon charge ratio

Thomas K. Gaisser

摘要:

在TeV范围内测量μ介子电荷比的解释取决于初级宇宙辐射中质子和中子的光谱以及大气中产生$π^\pm$和$K^\pm$的包容性截面。本文利用最近对宇宙线核能谱的测量,分别估算了质子和中子的能谱,从而计算了大气中的电荷分离强子级联。从$μ^+$和$μ^-$的相应产生光谱计算出$μ^+/μ^-$比,并与最近的测量结果进行比较。比较导致的相对贡献的K介子和π介子的测定。对$ν_μ$和$\barν_μ$的光谱的影响进行了讨论。

英文摘要:

Interpretation of measurements of the muon charge ratio in the TeV range depends on the spectra of protons and neutrons in the primary cosmic radiation and on the inclusive cross sections for production of $π^\pm$ and $K^\pm$ in the atmosphere. Recent measurements of the spectra of cosmic-ray nuclei are used here to estimate separately the energy spectra of protons and neutrons and hence to calculate the charge separated hadronic cascade in the atmosphere. From the corresponding production spectra of $μ^+$ and $μ^-$ the $μ^+/μ^-$ ratio is calculated and compared to recent measurements. The comparison leads to a determination of the relative contribution of kaons and pions. Implications for the spectra of $ν_μ$ and $\barν_μ$ are discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑