DSpace at EWHA: Constraints on the diffuse photon flux with energies above 10 18 eV using the surface detector of the Telescope Array experiment

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Constraints on the diffuse photon flux with energies above 10 18 eV using the surface detector of the Telescope Array experiment

Title: Constraints on the diffuse photon flux with energies above 10 18 eV using the surface detector of the Telescope Array experiment

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.I.; 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.; 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: Astroparticle Physics

ISSN: 0927-6505

Citation: Astroparticle Physics vol. 110, pp. 8 - 14

Keywords: Extensive air showers; Telescope array experiment; Ultra-high-energy photons

Publisher: Elsevier B.V.

Indexed: SCIE; SCOPUS

Document Type: Article

Abstract: We present the results of the search for ultra-high-energy photons with nine years of data from the Telescope Array surface detector. A multivariate classifier is built upon 16 reconstructed parameters of the extensive air shower. These parameters are related to the curvature and the width of the shower front, the steepness of the lateral distribution function, and the timing parameters of the waveforms sensitive to the shower muon content. A total number of two photon candidates found in the search is fully compatible with the expected background. The 95% CL limits on the diffuse flux of the photons with energies greater than 10 18.0 , 10 18.5 , 10 19.0 , 10 19.5 and 10 20.0 eV are set at the level of 0.067, 0.012, 0.0036, 0.0013, 0.0013km −2 yr −1 sr −1 correspondingly. © 2019 Elsevier B.V.