核-核碰撞中喷注淬火导致的双强子产生压低  

Suppression of Dihadron Production with Jet Quenching in A+A Collisions

作　　者：张汉中[1] 王恩科[1] 

机构地区：[1]华中师范大学粒子物理研究所,武汉430079

出　　处：《高能物理与核物理》2004年第9期967-972,共6页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金 ( 10 44 0 42 0 0 18;1992 85 11;10 13 5 0 3 0 ;10 3 4713 0 )资助~~

摘　　要：通过考虑喷注淬火效应 ,分析了相对论性高能重离子碰撞中双强子的产生 .结果表明 ,喷注淬火压低了大不变质量谱和大横动量的双强子的产生 .与质子 -质子碰撞的情形类似 ,核 -核的擦边碰撞 (碰撞参数很大 )产生的强子有很强的背靠背的关联 .在核 -核对心碰撞 (碰撞参数很小 )中 ,由于喷注穿过强作用物质导致的喷注淬火介质效应 ,产生的强子的背靠背的关联几乎消失 .Taking into account the jet quenching,we calculate dihadron production numerically when a hard parton jet produced in relativistic high energy heavy ion collision passes through strong interaction medium.It turns out that the dihadron with large invariable mass spectrum and large transverse momentum are all suppressed in the central nucleus-nucleus collision because of jet quenching effect.It is similar to the p-p collision,the produced hadron back-to-back correlation is strong for the peripheral nucleus-nucleus collision.This correlation is much weaker with decreasing the values of compact parameter.

关 键 词：高能物理学 重离子碰撞 不变质量谱 喷注淬火 双强子产生 核-核碰撞 碰撞参数 

分 类 号：O571[理学—粒子物理与原子核物理]