Cold Nuclear Matter Effects on Isolated Prompt Photon and Isolated Prompt Photon＋Jet Productions in Relativistic Heavy-Ion Collisions

We investigate the cold nuclear matter （CNM） effects on isolated prompt photon and isolated prompt photon associated jet productions in nuclear collisions at the NLO accuracy by using the EPS09 NLO nuclear parton distribution functions and their error sets. Nuclear modification factors of isolated p...

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Bibliographic Details
Published inCommunications in theoretical physics Vol. 59; no. 3; pp. 349 - 355
Main Author 代巍 陈时勇 张本威 王思科
Format Journal Article
LanguageEnglish
Published 01.03.2013
Subjects
光子
制作
喷气
大型强子对撞机
孤立
核物质
相对论重离子碰撞
部分子分布函数
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ISSN0253-6102
DOI10.1088/0253-6102/59/3/17

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Summary:We investigate the cold nuclear matter （CNM） effects on isolated prompt photon and isolated prompt photon associated jet productions in nuclear collisions at the NLO accuracy by using the EPS09 NLO nuclear parton distribution functions and their error sets. Nuclear modification factors of isolated prompt photon and isolated prompt photon＋jet productions due to CNM effects in p＋A and A＋A reactions at the RHIC and the LHC are provided with varying rapidity and transverse momentum of the final state photon. It is shown that the CNM effects on isolated prompt photon and photon＋jet are modest, which give a small enhancement at low PT region and a more obvious suppression at large pT at central rapidity. At forward rapidity a pronounced suppression of γ as well as γ＋jet is always observed.
Bibliography:We investigate the cold nuclear matter （CNM） effects on isolated prompt photon and isolated prompt photon associated jet productions in nuclear collisions at the NLO accuracy by using the EPS09 NLO nuclear parton distribution functions and their error sets. Nuclear modification factors of isolated prompt photon and isolated prompt photon＋jet productions due to CNM effects in p＋A and A＋A reactions at the RHIC and the LHC are provided with varying rapidity and transverse momentum of the final state photon. It is shown that the CNM effects on isolated prompt photon and photon＋jet are modest, which give a small enhancement at low PT region and a more obvious suppression at large pT at central rapidity. At forward rapidity a pronounced suppression of γ as well as γ＋jet is always observed.
DAI Wei, CHEN Shi-Yong , ZHANG Ben-Wei and WANG En-Ke （1Key Laboratory of Quark and Lepton Physics （MOE） and Institute of Particle Physics, Central China Normal University Wuhan 430079, China 2Nuclear Science Division, MS 70R0319, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA）
11-2592/O3
isolated photon; prompt photon; photon ＋jet;cold nuclear matter; effects; heavy ion collisions;EPS09; photon production
ISSN:0253-6102
DOI:10.1088/0253-6102/59/3/17