Author/Authors :
Masafumi Menjo، نويسنده , , H. and Adriani، نويسنده , , O. and Bonechi، نويسنده , , L. and Bongi، نويسنده , , M. and Castellini، نويسنده , , G. and D’Alessandro، نويسنده , , R. and Faus، نويسنده , , A. and Fukui، نويسنده , , K. and Haguenauer، نويسنده , , M. and Itow، نويسنده , , Y. and Kasahara، نويسنده , , K. and Kawade، نويسنده , , K. and Macina، نويسنده , , D. and Mase، نويسنده , , T. and Masuda، نويسنده , , K. and Matsubara، نويسنده , , Y. and Mitsuka، نويسنده , , G. and Mizuishi، نويسنده , , M. and Muraki، نويسنده , , Y. and Nakai، نويسنده , , M. Petrangeli Papini، نويسنده , , P. and Perrot، نويسنده , , M. and Ricciarini، نويسنده , , S. and Sako، نويسنده , , T. and Shimizu، نويسنده , , Y. and Taki، نويسنده , , K. and Tamura، نويسنده , , T. and Torii، نويسنده , , S. and Tricomi، نويسنده , , A. and Turner، نويسنده , , W.C. and Velasco، نويسنده , , J. and Viciani، نويسنده , , A. and Yoshida، نويسنده , , K.، نويسنده ,
Abstract :
The LHCf experiment aims to improve knowledge of forward neutral particle production spectra at the LHC energy which is relevant for the interpretation of air shower development of high energy cosmic rays. Two detectors, each composed of a pair of sampling and imaging calorimeters, have been installed at the forward region of IP1 to measure π0 energy spectra above 600 GeV. In this paper, we present a Monte Carlo study of the π0 measurements to be performed with one of the LHCf detectors for proton–proton collisions at s = 14 TeV. In approximately 40 min of operation at luminosity 0.8 × 10 29 cm - 2 s - 1 during the beam commissioning phase of LHC, about 1.5 × 104 π0 events are expected to be obtained at two transverse positions of the detector. The backgrounds from interactions of secondary particles with beam pipes and interactions of beam particles with residual gas in the beam pipes are expected to be less than 0.1% of the signal from π0s. We also discuss the capability of LHCf measurements to discriminate between the various hadron interaction models that are used for simulation of high energy air showers, such as DPMJET3.03, QGSJETII-03, SIBYLL2.1 and EPOS1.99.
