Measurement of the proton-air cross-section at sqrt(s) = 57 TeV with the Pierre Auger Observatory

0390458 - FZÚ 2013 RIV SK eng C - Conference Paper (international conference)
Ebr, Jan
Measurement of the proton-air cross-section at sqrt(s) = 57 TeV with the Pierre Auger Observatory.
Physics in Collision symposium (XXXII ). Košice: IEP SAS Košice, 2012 - (Bruncko, D.; Striženec, P.; Urbán, J.). ISBN 978-80-970779-9-0.
[Physics in Collision (XXXII). Štrbské Pleso (SK), 12.09.2012-15.09.2012]
R&D Projects: GA MŠMT(CZ) LA08016
Institutional research plan: CEZ:AV0Z10100502
Keywords : Pierre Auger Observatory * fluorescence detector * Glauber model
Subject RIV: BF - Elementary Particles and High Energy Physics

Using measured events from the fluorescence detector of the Pierre Auger Observatory, an unbiased distribution of the atmospheric slant depths where showers reach their maxima has been obtained. Analyzing the tail of this distribution the proton-air cross-section for particle production at center-of-mass energies per nucleon of 57 TeV is determined to be [505+-22(stat)+28-36(syst)] mb. Systematic uncertainties in the analysis arise from the limited knowledge of the primary mass composition, the need to use shower simulations and the selection of events. For the purpose of making comparisons with accelerator data we also calculate the inelastic and total proton-proton cross-sections using an extended Glauber model.
Permanent Link: http://hdl.handle.net/11104/0219374