Generators of Nuclear Collisions at the LHC Energy

摘要

Current versions of the most popular generators of ultrarelativistic heavy-ion collisions are used to simulate central (b < 3fm) Pb + Pb collisions at the LHC energy, s~(1/2) = 6A TeV. The charged-particle density predicted by the generators for the mid-rapidity range, dN_(ch)/dη, varies in a wide range, from about 2000 to about 6000. Moreover, even for a given generator, it depends strongly on model parameters and can vary from 10 to 100%.