1202.2083 (Alessia Tricomi et al.)

Results from LHCf Experiment    [PDF]

Alessia Tricomi, for the LHCf Collaboration

The LHCf experiment has taken data in 2009 and 2010 p-p collisions at LHC at
$\sqrt{s} = 0.9$ TeV and $\sqrt{s} = 7$ TeV. The measurement of the forward
neutral particle spectra produced in proton-proton collisions at LHC up to an
energy of 14 TeV in the center of mass system are of fundamental importance to
calibrate the Monte Carlo models widely used in the high energy cosmic ray
(HECR) field, up to an equivalent laboratory energy of the order of $10^{17}$
eV. In this paper the first results on the inclusive photon spectrum measured
by LHCf is reported. Comparison of this spectrum with the model expectations
show significant discrepancies, mainly in the high energy region. In addition,
perspectives for future analyses as well as the program for the next data
taking period, in particular the possibility to take data in p-Pb collisions,
will be discussed.

View original: http://arxiv.org/abs/1202.2083