金-金碰撞中由双光子过程产生的软双轻子(英文)  

Soft Dilepton Production in Au-Au Collisions by Two-photon Processes

作　　者：傅永平[1] 李云德[1] 

机构地区：[1]云南大学物理系,云南昆明650091

出　　处：《原子核物理评论》2012年第3期238-243,共6页Nuclear Physics Review

基　　金：National Natural Science Foundation of China(10665003,11065010)~~

摘　　要：计算了由准相干双光子相互作用导致的低横动量双轻子产生。对于不同的质量范围,准相干双光子相互作用在低横动量区域都很重要。将计算结果与相对论重离子对撞机RHIC的PHENIX实验数据进行比较,发现随着双轻子不变质量的增加,准相干双光子过程的修正作用会更加明显。The production of the low transverse momentum （Pv） dileptons induced by semi-cohe rent two-photon interaction is calculated. The numerical results are compared with the experimen tal data from the PHENIX, the modification of the semi-coherent two-photon interaction is re markable in the low transverse momentum region for different mass bins. We find that the contri bution of semi-coherent two-photon processes is more evident in the large dilepton mass region.

关 键 词：双光子相互作用 相对论重离子碰撞 双轻子产生 

分 类 号：O572.32[理学—粒子物理与原子核物理]