Jet Energy Shift due to Non-Perturbative QCD Effects in p+p Collisions Studied with PYTHIA
LI Han-Lin1,2**, ZHANG Ben-Wei2,3**, WANG En-Ke2
1College of Science, Wuhan University of Science and Technology, Wuhan 430065 2Key Laboratory of Quark & Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, Wuhan 430079 3Nuclear Science Division, MS 70R0319, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
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 RNP=0. It is observed that RNP=0 decreases with colliding energy √s and is larger for a gluon jet than a quark jet at any fixed ET.
(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))
引用本文:
. [J]. 中国物理快报, 2013, 30(5): 51301-051301.
LI Han-Lin, ZHANG Ben-Wei, WANG En-Ke. Jet Energy Shift due to Non-Perturbative QCD Effects in p+p Collisions Studied with PYTHIA. Chin. Phys. Lett., 2013, 30(5): 51301-051301.
2013, Vol. 30 
