https://doi.org/10.1140/epjp/s13360-020-00638-8
Regular Article
Testing cosmic ray composition models with very large-volume neutrino telescopes
1
APC, AstroParticule et Cosmologie, CNRS/IN2P3, Universitè Paris Diderot, Paris, France
2
CNRS/IN2P3, CPPM, Universitè Aix Marseille, Marseille, France
3
Dipartimento di Fisica e Astronomia dell’Università, Viale Berti Pichat 6/2, 40127, Bologna, Italy
4
Sezione di Bologna, INFN, Viale Berti-Pichat 6/2, 40127, Bologna, Italy
Received:
23
December
2019
Accepted:
15
July
2020
Published online:
5
August
2020
The composition in terms of nuclear species of the primary cosmic ray flux is largely uncertain in the knee region and above, where only indirect measurements are available. The predicted fluxes of high-energy leptons from cosmic ray air showers are influenced by this uncertainty. Different models have been proposed. Similarly, these uncertainties affect the measurement of lepton fluxes in very large-volume neutrino telescopes. Uncertainties in the cosmic ray interaction processes, mainly deriving from the limited amount of experimental data covering the particle physics at play, could also produce similar differences in the observable lepton fluxes and are affected as well by large uncertainties. In this paper we analyse how considering different models for the primary cosmic ray composition affects the expected rates in the current generation of very large-volume neutrino telescopes (ANTARES and IceCube). This is tested comparing two possible models of cosmic ray composition, but the same procedure can be expanded to different possible combinations of cosmic ray abundances. We observe that a certain degree of discrimination between composition fits can be already achieved with the current IceCube data sample, even though in a model-dependent way. The expected improvements in the energy reconstruction achievable with the next-generation neutrino telescopes is be expected to make these instruments more sensitive to the differences between models.
© The Author(s) 2020
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
