The LHCf experiment has been designed to precisely measure γ and π0 spectra produced in the very forward region of the proton-proton collisions at LHC, up to an energy of 14 TeV in the center of mass system. These measurements could significantly improve the correctness of the Monte Carlo models widely used in the high energy cosmic rays (HECR) field, since they allow an experimental data based calibration up to an equivalent laboratory energy of the order of 1017 eV. The LHCf experiment has taken data starting from 2008, both at 900 GeV and 7 TeV center of mass energies. It has later on been removed, when the LHC luminosity increased above 1030cm−2s−1. In this paper we report on the first γ inclusive spectrum that have been measured by LHCf; the comparison of this spectrum with the models expectations show significant discrepancies, mainly in the high energy region.
Status of LHCF / Adriani, O.; Bonechi, L.; Bongi, M.; Castellini, G.; D’Alessandro, R.; Fukatsu, K.; Hagenauer, M.; Itow, Y.; Kasahara, K.; Kawade, K.; Macina, D.; Mase, T.; Masuda, K.; Matsubara, Y.; Menjo, H.; Mitsuka, G.; Muraki, Y.; Nakai, M.; Noda, K.; Papini, P.; Perrot, A.L.; Ricciarini, S.; Sako, T.; Suzuki, K.; Suzuki, T.; Shimizu, Y.; Taki, K.; Tamura, T.; Torii, S.; Tricomi, A.; Turner and K Yoshida, W. C. Turner and K. Yoshida.. - ELETTRONICO. - (2012), pp. 19-24. (Intervento presentato al convegno 6th International Conference on Physics at LHC 2011, PLHC 2011 tenutosi a Perugia, ita nel 2011).
Status of LHCF
ADRIANI, OSCAR;Bonechi, L.;BONGI, MASSIMO;D'ALESSANDRO, RAFFAELLO;
2012
Abstract
The LHCf experiment has been designed to precisely measure γ and π0 spectra produced in the very forward region of the proton-proton collisions at LHC, up to an energy of 14 TeV in the center of mass system. These measurements could significantly improve the correctness of the Monte Carlo models widely used in the high energy cosmic rays (HECR) field, since they allow an experimental data based calibration up to an equivalent laboratory energy of the order of 1017 eV. The LHCf experiment has taken data starting from 2008, both at 900 GeV and 7 TeV center of mass energies. It has later on been removed, when the LHC luminosity increased above 1030cm−2s−1. In this paper we report on the first γ inclusive spectrum that have been measured by LHCf; the comparison of this spectrum with the models expectations show significant discrepancies, mainly in the high energy region.
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