Forward Photon Energy Spectrum at 7 TeV p-p Collisions Measured by the LHCf Experiment

Menjo, H.; Adriani, Oscar; Bongi, Massimo; Castellini, G.; D'Alessandro, Raffaello; Fukatsu, K.; Haguenauer, M.; Itow, Y.; Kasahara, K.; Kawade, K.; Macina, D.; Mase, T.; Masuda, K.; Mitsuka, G.; Muraki, Y.; Nakai, M.; Noda, K.; Papini, P.; Perrot, A. L.; Ricciarini, S.; Sako, T.; Shimizu, Y.; Suzuki, K.; Suzuki, T.; Taki, K.; Tamura, T.; Torri, S.; Tricomi, A.; Turner, W. C.

doi:10.1143/PTPS.193.212

The LHCf experiment is one of the LHC forward experiments. The aim is to measure the energy and the transverse momentum spectra of photons, neutrons and π0's at the very forward region of LHC collisions (the pseudo-rapidity range of η> 8.4), which should be critical data to calibrate hadron interaction models used in simulation codes of cosmic ray air showers. LHCf has successfully completed taking data at √s = 900 GeV and √s = 7 TeV proton-proton collisions in 2009 and 2010. We present the single photon energy spectra at √s = 7 TeV proton-proton collisions and the pseudo-rapidity ranges of η> 10.94 and 8.81 ≪ η≪ 8.9.

Forward Photon Energy Spectrum at 7 TeV p-p Collisions Measured by the LHCf Experiment / Menjo, H.; Adriani, O.; Bongi, M.; Castellini, G.; D'Alessandro, R.; Fukatsu, K.; Haguenauer, M.; Itow, Y.; Kasahara, K.; Kawade, K.; Macina, D.; Mase, T.; Masuda, K.; Mitsuka, G.; Muraki, Y.; Nakai, M.; Noda, K.; Papini, P.; Perrot, A. L.; Ricciarini, S.; Sako, T.; Shimizu, Y.; Suzuki, K.; Suzuki, T.; Taki, K.; Tamura, T.; Torri, S.; Tricomi, A.; Turner, W. C.. - In: PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT. - ISSN 0375-9687. - ELETTRONICO. - 193:(2012), pp. 212-215. [10.1143/PTPS.193.212]