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Volume 358 - 36th International Cosmic Ray Conference (ICRC2019) - CRI - Cosmic Ray Indirect
Anisotropy in the mass composition from the Telescope Array Surface Detector data
Y. Zhezher,* G. Rubtsov, P. Sokolsky, S. Troitsky
*corresponding author
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Pre-published on: 2019 August 20
Published on:
Abstract
The mass composition of the Telescope Array surface detector data is analyzed with the use of the Boosted Decision Trees (BDT) technique, which assigns one parameter $\xi$ for each event, which is then concequently used for the determination of the average atomic mass of the primary particle. Itself, $\xi$ parameter may be distributed unevenly across the sky and indicate the mass composition anisotropy of the ultra-high-energy cosmic rays. The sensitivity of the BDT-based mass composition technique to the possible anisotropies is tested with the use of the $\xi$ distribution for the proton and iron Telesope Array surface detector Monte-Carlo sets.
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