膨胀QGP的热双轻子产生(英文)  

Thermal Dilepton Production in the Expanding QGP

作　　者：傅永平 杨光弟 郗勤 

机构地区：[1]临沧师范高等专科学校数理系,云南临沧677000

出　　处：《原子核物理评论》2012年第4期353-357,共5页Nuclear Physics Review

基　　金：Scientific Research Foundation of Education Department of Yunnan Province(2012Y274);Supporting Science Foundation for High-level Talents Introduction of Lincang Teachers College(2012)~~

摘　　要：研究了QGP中次级热双轻子的产生。在RHIC能区,次级热双轻子的产生在低质量范围0.2GeV<M<0.8GeV内加强了热双轻子谱。次级热双轻子产生机制能够较好地解释PHENIX Au-Au 200 AGeV碰撞实验的双轻子增强现象。对于LHC能区的Pb-Pb 5.5 ATeV碰撞,理论计算结果表明,在低质量区域双轻子增强现象会更加明显,增强区域在1.0GeV<M<2.5GeV范围内。The secondary thermal dileptons produced from the quark-gluon plasma are investigated.The secondary thermal dileptons produced at RHIC energy were concentrated in the low mass region of 0.2GeV<M<0.8GeV.The mechanism of the secondary thermal dileptons could be properly explained the enhancement of the dilepton yield in PHENIX experiments for Au-Au 200 AGeV collisions.For Pb-Pb 5.5 ATeV collisions at LHC,the enhancement is more evident in the low mass region of 0.3GeV<M<1.0GeV,and also exists in the intermediate mass region of 1.0GeV <M<2.5GeV at LHC.

关 键 词：双轻子产生 次级热双轻子 相对论重离子碰撞 

分 类 号：O572.2[理学—粒子物理与原子核物理]