摘要
Utilizing PYTHIA we study non-pertubative QCD effects to jet transverse momentum shift in hadronic collisions at the RHIC and the LHC.The dependences of non-perturbative effects such as hadronization corrections and underlying event effect on jet radius R,colliding energy,color factor,transverse momentum are investigated by numerical simulations.Hadronization corrections give a negative contribution to the jet energy shift and its magnitude decreases with jet ET and colliding energy √s as well as jet radius R.However,the underlying event effect gives a positive contribution to the jet energy shift and its contribution increases with jet radius and √s.Hadronization and underlying event effect offset each other and could be canceled completely at a specific jet radius dubbed R_(NP)=0.It is observed that R_(NP)=0 decreases with colliding energy √s and is larger for a gluon jet than a quark jet at any fixed ET.
作者
LI Han-Lin
ZHANG Ben-Wei
WANG En-Ke
李汉林;张本威;王恩科(College of Science,Wuhan University of Science and Technology,Wuhan 430065;Key Laboratory of Quark&Lepton Physics(MOE)and Institute of Particle Physics,Central China Normal University,Wuhan 430079;Nuclear Science Division,MS 70R0319,Lawrence Berkeley National Laboratory,Berkeley,CA 94720,USA)
基金
the New Century Excellent Talent Project(NCET)of the Ministry of Education of China under Grant No NCET-09-0411
the National Natural Science Foundation of China
the Self-Determined Fund of WUST and CCNU.
