Abstract:The origin of cosmic ray (CR) spectral knee around ∼4 PeV is unknown. Composition studies around the knee can provide information on the CR sources and propagation. LHAASO-KM2A is capable of simultaneously measuring the EM and muonic components in extensive air showers. The triggered events of LHAASO-KM2A are dominated by CRs of higher energies at larger zenith angles because of the increasing atmospheric attenuation. In this work, we use the KM2A observed spectrum of muon-to-electron number ratio to constrain… Show more
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