Speaker
Description
We propose to study the angular distributions of the energy deposited in FHCal modules. The obtained distributions were fitted by the linear function on event-by-event basis. This fit allows to extract the transverse gradient of the spectator energy in the calorimeter and also the energy carried by free spectators inside the beam hole. The clear correlations between the fit parameters are observed in full range of the collision centralities.
Assuming, that the peripheral area of FHCal is occupied mainly by the produced particles (pions), it can be possible to subtract their energy contributions to the full FHCal energy. It makes possible to calculate the energy of free spectators in the central collisions and to avoid the ambiguity in FHCal energy depositions for central and peripheral events. Potentially, the developed approaches would help in the determination of the centrality of the collision with FHCal without application of the TPC information on multiplicity.
