LHCf: calibration of hadron interaction models for high energy cosmic‐ray physics at the LHC energy

LHCf measures the energy and transverse momentum of neutral particles produced in the forward region of the LHC interaction point. In high energy cosmic ray measurements, the results strongly depend on the hadron interaction model which is used in the air shower simulation. LHCf will take data at s = 0.9, 2.4, 7, 10 and 14 TeV collisions at LHC and provide crucial calibration points for the hadron interaction models.