Geometric Scaling in New Combined Hadron-Electron Ring Accelerator Data
ZHOU Xiao-Jiao1, QI Lian1, KANG Lin1, ZHOU Dai-Cui2, XIANG Wen-Chang1,2**
1College of Physics and Electronics Science, Guizhou Normal University, Guiyang 550001 2Institute of Particle Physics, Huazhong Normal University, Wuhan 430079
Abstract：We study the geometric scaling in the new combined data of the hadron-electron ring accelerator by using the Golec-Biernat–Wüsthoff model. It is found that the description of the data is improved once the high accurate data are used to determine the model parameters. The value of x0 extracted from the fit is larger than the one from the previous study, which indicates a larger saturation scale in the new combined data. This makes more data located in the saturation region, and our approach is more reliable. This study lets the saturation model confront such high precision new combined data, and tests geometric scaling with those data. We demonstrate that the data lie on the same curve, which shows the geometric scaling in the new combined data. This outcome seems to support that the gluon saturation would be a relevant mechanism to dominate the parton evolution process in deep inelastic scattering, due to the fact that the geometric scaling results from the gluon saturation mechanism.
(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))
2014, Vol. 31 
