TY - JOUR
T1 - The energy spectrum of forward photons measured by the RHICf experiment in vs = 510 GeV proton-proton collisions
AU - Sato, K.
AU - Itow, Y.
AU - Menjo, H.
AU - Ueno, M.
AU - Ohashi, K.
AU - Sako, T.
AU - Goto, Y.
AU - Nakagawa, I.
AU - Saidl, R.
AU - Park, J. S.
AU - Kim, M. H.
AU - Hong, B.
AU - Tanida, K.
AU - Torii, S.
AU - Kasahara, K.
AU - Sakurai, N.
AU - Adriani, O.
AU - D'Alessandro, R.
AU - Bonechi, L.
AU - Berti, E.
AU - Tricomi, A.
N1 - Funding Information:
The RHICf collaboration is grateful to the people related to the RHIC, the STAR collaboration, the PHENIX collaboration and the LHCf collaboration to support the experiment. This program is partly supported by the Japan-US Science and Technology Cooperation Program in High Energy Physics. A part of this work was performed using the computer resource provided by the Institute for the Cosmic-Ray Research (ICRR), University of Tokyo.
Publisher Copyright:
© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).
PY - 2019
Y1 - 2019
N2 - The Relativistic Heavy Ion Collider forward (RHICf) experiment aims at understanding the high-energy hadronic interaction by measuring the cross sections of very forward neutral particles in proton-proton collisions at vs = 510 GeV. For the analysis of the photon measurement, the trigger efficiency and the particle identification performance are studied by using the Monte Carlo simulation data and the experimental data. In the RHICf operation, two kinds of trigger modes (Shower, HighEM) were implemented. The trigger efficiency of the Shower trigger is 100% for photons with the energies more than 20 GeV. The HighEM trigger is designed to detect high energy photons effectively, and the trigger efficiency of the HighEM trigger is 90% for photons with the energies more than 130 GeV. The correction factor for the photon identification is calculated by using the efficiency and purity. It is found that this correction does not make a sizeable effect on the shape of the energy spectrum because the energy dependency of the factor is small.
AB - The Relativistic Heavy Ion Collider forward (RHICf) experiment aims at understanding the high-energy hadronic interaction by measuring the cross sections of very forward neutral particles in proton-proton collisions at vs = 510 GeV. For the analysis of the photon measurement, the trigger efficiency and the particle identification performance are studied by using the Monte Carlo simulation data and the experimental data. In the RHICf operation, two kinds of trigger modes (Shower, HighEM) were implemented. The trigger efficiency of the Shower trigger is 100% for photons with the energies more than 20 GeV. The HighEM trigger is designed to detect high energy photons effectively, and the trigger efficiency of the HighEM trigger is 90% for photons with the energies more than 130 GeV. The correction factor for the photon identification is calculated by using the efficiency and purity. It is found that this correction does not make a sizeable effect on the shape of the energy spectrum because the energy dependency of the factor is small.
UR - http://www.scopus.com/inward/record.url?scp=85086263885&partnerID=8YFLogxK
M3 - Conference article
AN - SCOPUS:85086263885
SN - 1824-8039
VL - 358
JO - Proceedings of Science
JF - Proceedings of Science
T2 - 36th International Cosmic Ray Conference, ICRC 2019
Y2 - 24 July 2019 through 1 August 2019
ER -