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Abstract：
The muon content of cosmic ray air showers is sensitive to both the hadronic interactions within the shower and the primary cosmic ray nuclei composition. The large high altitude air shower observatory (LHAASO) has comprehensively measured the information of the air showers of very high energy cosmic rays. A cosmic ray mass independent energy reconstruction method has been proposed by combining the muon content and the electromagnetic particles of the air shower. The mean logarithmic mass of the cosmic ray also has been estimated based on the muon content of the air shower. Also, the attenuation length of muon content in the air shower has measured and compared with expectations of several hadronic interaction models. The fluctuation of the muon content of the air shower has been used to estimate the variance of logarithmic mass of the cosmic ray. This talk will show all the aforementioned air shower studies.
Biography：
Cunfeng Feng is a professor at the Research Center for Particle Science and Technology, Shandong University. He earned his PhD degree in particle physics and nuclear physics at Shandong University in 1999. As a member of the ATLAS collaboration, he once built 400 thin gap chambers for the forward muon trigger detector of ATLAS and then carried out series measurement work related to single top quark. Since 2009, he has participated in the development of the electromagnetic particle detector of LHAASO and is responsible for the quality of the photomultiplier tubes. In recent years, he has mainly carried out cosmic ray observation research using the LHAASO experiment, precisely measured the all-particle energy spectrum and average mass of cosmic rays, and carried out a series of studies on the behavior of muons during the air shower process of cosmic rays.
Online Meeting Room：https://meeting.tencent.com/dm/aZgfbjAzpLym
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