Charged Hadron Multiplicity at RHIC and LHC Energies from Color Glass Condensate
XIANG Wen-Chang1,2, ZHANG Jun-Jie1, CHEN Shi-Guo1**, LIU Wan-Song1, ZHOU Dai-Cui2
1College of Physics and Electronics Science, Guizhou Normal University, Guiyang 550001 2Institute of Particle Physics, Huazhong Normal University, Wuhan 430079
Abstract：We investigate charged hadron production at RHIC and LHC energies in the framework of color glass condensate. Our study gives a very good description of the experimental data of inclusive charged hadron production in proton–proton collisions at both RHIC and LHC energies. The saturation scale is treated as a free parameter, which will reduce the uncertainties from fitting low-energy experimental data and the modeling of the saturation momentum. We find a reasonable value of the saturation scale Qs ～1 GeV, which is consistent with the theoretical findings. The running coupling effect is taken into account, and it is found that it plays an important role in the description of the experimental data. We provide quantitative predictions of the rapidity dependence of the inclusive charged hadron production for the upcoming LHC experiment in proton–proton collisions at √s=14 TeV.
(Relativistic heavy-ion collisions (collisions induced by light ions studied to calibrate relativistic heavy-ion collisions should be classified under both 25.75.-q and sections 13 or 25 appropriate to the light ions))
2013, Vol. 30 
