Reconstruction of inclined showers at the Pierre Auger Observatory: implications for the muon content
The properties of extensive air showers (EAS) induced by cosmic rays with zenith angles up to 80 can bemeasured accurately in the surface detector (SD) of the Pierre Auger Observatory. Using a model of the density patternof muons, extracted from simulations, the shower size, N19, related to the total number of muons in EAS, is estimatedfrom the signals measured in the SD stations. The accuracy of the reconstruction of N19 is tested using a large sample ofsimulated events. The shower size is calibrated using the shower energy measured with the fluorescence detector (FD) ina sub-sample of high-quality hybrid events (i.e. events detected simultaneously by SD and FD). This allows the numberof muons versus energy to be measured. We compare the number of muons versus energy as obtained through simulationswith that measured in data. We find that none of the current shower models, neither for proton nor for iron primaries, areable to predict as many muons as are observed.
Cosmic, Rays, Pierre, Auger, Observatory, inclined, events, muons, detection
GONZALO RODRIGUEZ
Departamento de Fisica de Particulas e IGFAE, Universidade de Santiago de Compostela, Spain
国际会议
北京
英文
1-4
2011-08-11（万方平台首次上网日期，不代表论文的发表时间）