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Title: Mass composition of ultrahigh-energy cosmic rays with the Telescope Array Surface Detector data Authors: ID Abbasi, R.U. (Author) ID Lundquist, Jon Paul, UNG (Author), et al. Files: This document has no files that are freely available to the public. This document may have a physical copy in the library of the organization, check the status via COBISS.  Language: English Work type: Not categorized Typology: 1.01 - Original Scientific Article Organization: UNG - University of Nova Gorica Abstract: The results on ultrahigh-energy cosmic rays (UHECR) mass composition obtained with the Telescope Array surface detector are presented. The analysis employs the Boosted Decision tree (BDT) multivariate analysis built upon 14 observables related to both the properties of the shower front and the lateral distribution function. The multivariate classifier is trained with Monte-Carlo sets of events induced by the primary protons and iron. An average atomic mass of UHECR is presented for energies 10^18.0–10^20.0 eV. The average atomic mass of primary particles shows no significant energy dependence and corresponds to ⟨lnA⟩=2.0±0.1 (stat.)±0.44(syst.). The result is compared to the mass composition obtained by the Telescope Array with Xmax technique along with the results of other experiments. Possible systematic errors of the method are discussed. Keywords: UHECR, Cosmic rays, composition Publication version: Version of Record Year of publishing: 2019 Number of pages: 11 Numbering: 2, 99 PID: 20.500.12556/RUNG-5148-834f2c11-0802-3546-702d-75f2ffb91248  COBISS.SI-ID: 12823043  DOI: 10.1103/PhysRevD.99.022002  NUK URN: URN:SI:UNG:REP:OY3GVS8P Publication date in RUNG: 27.04.2020 Views: 3516 Downloads: 0 Metadata:    Cite this work Plain text BibTeX EndNote XML EndNote/Refer RIS ABNT ACM Ref AMA APA Chicago 17th Author-Date Harvard IEEE ISO 690 MLA Vancouver : Copy citation

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Record is a part of a journal

Title:	Physical Review D
Year of publishing:	2019

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License:	CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:	http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:	The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:	27.04.2020

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