Forward photon energy spectrum at LHC 7TeV p–p collisions measured by LHCf

Authors :: 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.
Source :: Nuclear Instruments & Methods in Physics Research Section A. Nov2012, Vol. 692, p224-227. 4p.
Publication Year :: 2012
Abstract: Abstract: 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 ''s at the very forward region (the pseudo-rapidity range of ), which should be critical data to calibrate hadron interaction models used in the air shower simulations. LHCf successfully operated at and proton–proton collisions in 2009 and 2010. We present the first physics result, single photon energy spectra at proton–proton collisions and the pseudo-rapidity ranges of and . The obtained spectra were compared with the predictions by several hadron interaction models and the models do not reproduce the experimental results perfectly. [Copyright &y& Elsevier]