Measurement of forward photon production cross-section in proton–proton collisions at s=13TeV with the LHCf detector

Abstract In this paper, we report the production cross-section of forward photons in the pseudorapidity regions of η > 10.94 and 8.99 > η > 8.81 , measured by the LHCf experiment with proton–proton collisions at s = 13 TeV . The results from the analysis of 0.191 nb − 1 of data obtained in June 2015 are compared to the predictions of several hadronic interaction models that are used in air-shower simulations for ultra-high-energy cosmic rays. Although none of the models agree perfectly with the data, EPOS-LHC shows the best agreement with the experimental data among the models.