DSpace at EWHA: Mass composition of ultrahigh-energy cosmic rays with the Telescope Array Surface Detector data

Browse

My Repository

DSpace at EWHA자연과학대학 물리학전공 Journal papers

View : 1148 Download: 301

Mass composition of ultrahigh-energy cosmic rays with the Telescope Array Surface Detector data

Title: Mass composition of ultrahigh-energy cosmic rays with the Telescope Array Surface Detector data

Authors: 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.; Fujita K.; Fukushima M.; Furlich G.; Goto T.; Hanlon W.; Hayashi M.; Hayashi Y.; Hayashida N.; Hibino K.; Honda K.; Ikeda D.; Inoue N.; Ishii T.; Ishimori R.; Ito H.; Ivanov D.; Jeong H.M.; Jeong S.; Jui C.C.H.; Kadota K.; Kakimoto F.; Kalashev O.; Kasahara K.; Kawai H.; Kawakami S.; Kawana S.; Kawata K.; Kido E.; Kim H.B.; Kim J.H.; Kishigami S.; Kitamura S.; Kitamura Y.; Kuzmin V.; Kuznetsov M.; Kwon Y.J.; Lee K.H.; Lubsandorzhiev B.; Lundquist J.P.; Machida K.; Martens K.; Matsuyama T.; Matthews J.N.; Mayta R.; Minamino M.; Mukai K.; Myers I.; Nagasawa K.; Nagataki S.; Nakamura R.; Nakamura T.; Nonaka T.; Oda H.; Ogio S.; Ogura J.; Ohnishi M.; Ohoka H.; Okuda T.; Omura Y.; Ono M.; Onogi R.; Oshima A.; Ozawa S.; Park I.H.; Piskunov M.S.; Pshirkov M.S.; Remington J.; Rodriguez D.C.; Rubtsov G.; Ryu D.; Sagawa H.; Sahara R.; Saito K.; Saito Y.; Sakaki N.; Sakurai N.; Scott L.M.; Seki T.; Sekino K.; Shah P.D.; Shibata F.; Shibata T.; Shimodaira H.; Shin B.K.; Shin H.S.; Smith J.D.; Sokolsky P.; Stokes B.T.; Stratton S.R.; Stroman T.A.; Suzawa T.; Takagi Y.; Takahashi Y.; Takamura M.; Takeda M.; Takeishi R.; Taketa A.; Takita M.; Tameda Y.; Tanaka H.; Tanaka K.; Tanaka M.; Thomas S.B.; Thomson G.B.; Tinyakov P.; Tkachev I.; Tokuno H.; Tomida T.; Troitsky S.; Tsunesada Y.; Tsutsumi K.; Uchihori Y.; Udo S.; Urban F.; Wong T.; Yada K.; Yamamoto M.; Yamane R.; Yamaoka H.; Yamazaki K.; Yang J.; Yashiro K.; Yoneda Y.; Yoshida S.; Yoshii H.; Zhezher Y.; Zundel Z.

Ewha Authors: 양종만

SCOPUS Author ID: 양종만

Issue Date: 2019

Journal Title: Physical Review D

ISSN: 2470-0010

Citation: Physical Review D vol. 99, no. 2

Publisher: American Physical Society

Indexed: SCIE; SCOPUS

Document Type: Article

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 1018.0-1020.0 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. © 2019 American Physical Society.