A new observable in extensive air showers

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• 作者：C.A. Garcí ; a Canal^a ; ^{cgarciacanal@fisica.unlp.edu.arg" class="auth_mail" title="E-mail the corresponding author} ; J.I. Illana^b ; ^{jillana@ugr.es" class="auth_mail" title="E-mail the corresponding author} ; M. Masip ; ^b ; ^{masip@ugr.es" class="auth_mail" title="E-mail the corresponding author} ; S.J. Sciutto^a ; ^{sciutto@fisica.unlp.edu.arg" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Extensive air shower ; Cosmic-ray composition ; Forward charm
• 刊名：Astroparticle Physics
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：85
• 期：Complete
• 页码：50-53
• 全文大小：463 K

文摘

We find that the ratio r_μe of the muon to the electromagnetic component of an extended air shower at the ground level provides an indirect measure of the depth X_max of the shower maximum. This result, obtained with the air-shower code AIRES, is independent of the hadronic model used in the simulation. We show that the value of r_μe in a particular shower discriminates its proton or iron nature with a 98% efficiency. We also show that the eventual production of forwardheavy quarks inside the shower may introduce anomalous values of r_μe in isolated events.