Measurement of the production cross-sections of $π^\pm$ in p-C and $π^\pm$-C interactions at 12 GeV/c

Details Measurement of the production cross-sections of $π^\pm$ in p-C and $π^\pm$-C interactions at 12 GeV/c Measurement of the production cross-sections of $π^\pm$ in p-C and $π^\pm$-C interactions at 12 GeV/c

2008-02-05

arxiv.org/abs/0802.0657v1

Astronomy and Astrophysics

Astrophysics

accepted for publication in Astroparticle Physics

Scientific paper

The results of the measurements of the double-differential production cross-sections of pions in p-C and $\pi^\pm$-C interactions using the forward spectrometer of the HARP experiment are presented. The incident particles are 12 GeV/c protons and charged pions directed onto a carbon target with a thickness of 5% of a nuclear interaction length. For p-C interactions the analysis is performed using 100035 reconstructed secondary tracks, while the corresponding numbers of tracks for $\pi^-$-C and $\pi^+$-C analyses are 106534 and 10122 respectively. Cross-section results are presented in the kinematic range 0.5 GeV/c $\leq p_{\pi} <$ 8 GeV/c and 30 mrad $\leq \theta_{\pi} <$ 240 mrad in the laboratory frame. 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.

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