Measurement of the proton-air cross section with Telescope Array's Black Rock Mesa and Long Ridge fluorescence detectors, and surface array in hybrid mode

Authors

R. U. Abbasi, Loyola University of ChicagoFollow
M. Abe, Saitama University
T. Abu-Zayyad, The University of Utah
M. Allen, The University of Utah
R. Azuma, Tokyo Institute of Technology
E. Barcikowski, The University of Utah
J. W. Belz, The University of Utah
D. R. Bergman, The University of Utah
S. A. Blake, The University of Utah
R. Cady, The University of Utah
B. G. Cheon, Hanyang University
J. Chiba, Tokyo University of Science
M. Chikawa, The University of Tokyo
A. Di Matteo, Université Libre de Bruxelles
T. Fujii, Hakubi Center for Advanced Research
K. Fujisue, The University of Tokyo
K. Fujita, Osaka Metropolitan University
R. Fujiwara, Osaka Metropolitan University
M. Fukushima, The University of Tokyo
G. Furlich, The University of Utah
W. Hanlon, The University of Utah
M. Hayashi, Shinshu University
N. Hayashida, Kanagawa University
K. Hibino, Kanagawa University
R. Higuchi, The University of Tokyo
K. Honda, University of Yamanashi
D. Ikeda, The University of Tokyo

Document Type

Article

Publication Date

9-15-2020

Publication Title

Physical Review D

Volume

102

Issue

6

Abstract

Ultrahigh energy cosmic rays provide the highest known energy source in the Universe to measure proton cross sections. Though conditions for collecting such data are less controlled than an accelerator environment, current generation cosmic ray observatories have large enough exposures to collect significant statistics for a reliable measurement for energies above what can be attained in the laboratory. Cosmic ray measurements of cross section use atmospheric calorimetry to measure depth of air shower maximum (Xmax), which is related to the primary particle's energy and mass. The tail of the Xmax distribution is assumed to be dominated by showers generated by protons, allowing measurement of the inelastic proton-air cross section. In this work, the proton-air inelastic cross section measurement, σp-airinel, using data observed by Telescope Array's Black Rock Mesa and Long Ridge fluorescence detectors and surface detector array in hybrid mode is presented. σp-airinel is observed to be 520.1±35.8[Stat]-42.9+25.3[Sys] mb at s=73 TeV. The total proton-proton cross section is subsequently inferred from Glauber formalism and is found to be σpptot=139.4-21.3+23.4[Stat]-25.4+15.7[Sys] mb.

Identifier

85096330859 (Scopus)

Recommended Citation

Abbasi, R. U.; Abe, M.; Abu-Zayyad, T.; Allen, M.; Azuma, R.; Barcikowski, E.; Belz, J. W.; Bergman, D. R.; Blake, S. A.; Cady, R.; Cheon, B. G.; Chiba, J.; Chikawa, M.; Di Matteo, A.; Fujii, T.; Fujisue, K.; Fujita, K.; Fujiwara, R.; Fukushima, M.; Furlich, G.; Hanlon, W.; Hayashi, M.; Hayashida, N.; Hibino, K.; Higuchi, R.; Honda, K.; and Ikeda, D., "Measurement of the proton-air cross section with Telescope Array's Black Rock Mesa and Long Ridge fluorescence detectors, and surface array in hybrid mode" (2020). Physics: Faculty Publications and Other Works. 101.
https://ecommons.luc.edu/physics_facpubs/101