The proton-air inelastic cross section (σp-airinel) is measured at s≈2TeV at the EAS-TOP extensive air shower experiment by studying the absorption length of cosmic ray proton primaries cascades reaching the maximum development at the observation level. Primary energies, in the region E0=(1.5÷2.5)·1015eV, are selected through the EAS muon number (Nμ), and proton originated cascades at maximum development are selected by means of the shower size (Ne). The observed absorption length (λobs) is a convolution of the proton-air interaction length (λp-air) and of the shower and detector fluctuations. The conversion factor k=λobs/λint is obtained by means of simulations performed with the CORSIKA code and the QGSJET II and SIBYLL interaction models. The obtained value of the p-air inelastic cross section at s≈2TeV is σp-airinel=338±21(stat)±19(syst)-28(syst)mb. The statistical and systematic uncertainties, as well as the relationships with the pp (p¯p) total cross section measurements are discussed.
M., A., B., A., P., A., F., A., L., B., M., B., et al. (2009). Measurement of the proton-air inelastic cross section at s≈2 TeV from the EAS-TOP experiment. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 79 [10.1103/PhysRevD.79.032004].
Measurement of the proton-air inelastic cross section at s≈2 TeV from the EAS-TOP experiment
STAMERRA, ANTONIO;
2009-01-01
Abstract
The proton-air inelastic cross section (σp-airinel) is measured at s≈2TeV at the EAS-TOP extensive air shower experiment by studying the absorption length of cosmic ray proton primaries cascades reaching the maximum development at the observation level. Primary energies, in the region E0=(1.5÷2.5)·1015eV, are selected through the EAS muon number (Nμ), and proton originated cascades at maximum development are selected by means of the shower size (Ne). The observed absorption length (λobs) is a convolution of the proton-air interaction length (λp-air) and of the shower and detector fluctuations. The conversion factor k=λobs/λint is obtained by means of simulations performed with the CORSIKA code and the QGSJET II and SIBYLL interaction models. The obtained value of the p-air inelastic cross section at s≈2TeV is σp-airinel=338±21(stat)±19(syst)-28(syst)mb. The statistical and systematic uncertainties, as well as the relationships with the pp (p¯p) total cross section measurements are discussed.
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https://hdl.handle.net/11365/43578
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