Jet energy shift due to non-perturbative QCD effects in p+p collisions studied with PYTHIA
Jet energy shift due to non-perturbative QCD effects in p+p collisions studied with PYTHIA
复制标题
使用 PYTHIA 研究 p p 碰撞中非微扰 QCD 效应导致的射流能量转移
DOI：
10.1088/0256-307x/30/5/051301
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发表时间：
2013
影响因子：
3.5
通讯作者：
Wang En
中科院分区：
文献类型：
--
作者：
Li Han;Zhang Ben;Wang En
利用PYTHIA研究了RHIC和LHC强子碰撞中非微扰QCD效应对射流横向动量位移的影响。通过数值模拟研究了强子化修正和基础事件效应等非微扰效应对射流半径R、碰撞能量、颜色因子、横向动量的依赖关系。强子化修正对射流能量转移的贡献为负，其大小随射流ET、碰撞能量√s和射流半径r的增大而减小，而底层事件效应对射流能量转移的贡献为正，且随射流半径和√s的增大而增大。强子化和潜在事件效应相互抵消，在特定的射流半径RNP = 0时可以完全消除。观察到RNP=0随碰撞能量√s而减小，在任意固定ET下，胶子射流的RNP大于夸克射流。
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.