期刊
ASTROPARTICLE PHYSICS
卷 34, 期 6, 页码 360-367出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.astropartphys.2010.10.002
关键词
High energy cosmic rays; Extensive air showers; Longitudinal profiles; Primary mass composition; Cross-section; Hadronic models
资金
- Fundacao para a Ciencia e Tecnologia, Portugal [CERN/FP/109286/2009, SFRH/BD/30706/2006]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/30706/2006, CERN/FP/109286/2009] Funding Source: FCT
The longitudinal development of extreme energy cosmic ray showers has a characteristic Universal Shower Profile when normalized and translated to the shower maximum. Experimentally accessible observables can be defined to parametrize the average shape and characterize each event. By describing the full shape of the profile, information related to the first hadronic interactions and primary particle type can be extracted. A shape variable which measures the distance from the first interaction to the depth of maximum can lead to a cosmic ray composition analysis with independent extraction of the primary cross-sections. (C) 2010 Elsevier B.V. All rights reserved.
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