Forward π

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• 作者：HARP Collaboration ; M.G. Catanesi ; E. Radicioni ; R. Edgecock ; M. Ellis ; C. Gö ; ß ; ling ; S. Bunyatov ; A. Krasnoperov ; B. Popov ; V. Tereschenko ; E. Di Capua ; G. Vidal– ; Sitjes ; A. Artamonov
• 关键词：EAS ; Hadronic cross-sections
• 刊名：Astroparticle Physics
• 出版年：2008
• 出版时间：October 2008
• 年：2008
• 卷：30
• 期：3
• 页码：124-132
• 全文大小：409 K

文摘

Measurements of double-differential charged pion production cross-sections in interactions of 12 GeV/c protons on O<sub>2sub> and N<sub>2sub> thin targets are presented in the kinematic range 0.5 GeV/c p<sub>πsub><8 GeV/c and 50 mrad θ<sub>πsub><250 mrad (in the laboratory frame) and are compared with p–C results. For p–N<sub>2sub> (p–O<sub>2sub>) interactions the analysis is performed using 38576 (7522) reconstructed secondary pions. The analysis uses the beam instrumentation and the forward spectrometer of the HARP experiment at CERN PS. The measured cross-sections have a direct impact on the precise calculation of atmospheric neutrino fluxes and on the improved reliability of extensive air shower simulations by reducing the uncertainties of hadronic interaction models in the low energy range. In particular, the present results allow the common hypothesis that p–C data can be used to predict the p–N<sub>2sub> and p–O<sub>2sub> pion production cross-sections to be tested.