Φ介子压缩关联的研究  

The research for back-to-back correlation of Φ

作　　者：尹洪杰[1] 张勇 YIN Hongjie1, ZHANG Yong2,3(1. College of Mathematics and Physics, Bohai University, Jinzhou 121013, China 2. School of Mathematics and Physics, Jiangsu University of Technology,Changzhou 213001 3. College of Science and Technology, Inner Mongolia University, Baotou 014010)

机构地区：[1]渤海大学数理学院,辽宁锦州121013 [2]江苏理工学院数理学院,江苏常州213001 [3]内蒙古科技大学理学院,内蒙古自治区包头014010

出　　处：《渤海大学学报（自然科学版）》2018年第2期144-147,共4页Journal of Bohai University:Natural Science Edition

基　　金：内蒙古自然科学基金项目(No:2017BS0104)

摘　　要：在高能重离子碰撞中,由于末态粒子被探测到之前会与强子介质会发生相互作用,因而处于强子介质中的玻色子发生了质量偏移,产生一种压缩效应,从而导致正反玻色子对的一种压缩关联.由于Φ介子具有独特的奇异-反奇异夸克结构,因而文中对Φ介子的压缩关联进行了研究.首先对压缩关联函数进行了介绍,然后分析了质量偏移对压缩关联的影响,最后讨论了Φ介子的压缩关联随着两粒子动量横向方位夹角和赝快度变化的情况.结果表明,不同的质量偏移,导致的压缩关联是不同的,Φ介子压缩关联在正反粒子动量横向方位夹角为π时最大,随着动量横向方位夹角减小而快速减小到1,并且压缩关联随着赝快度的增大而减小.Φ介子压缩关联的研究对人们进一步认识夸克-胶子等离子体的性质是至关重要的.In high energy heavy ion collisions,because the final state particles will interact with hadronic medium before they are detected,so the bosons will mass modification in the hadronic medium. There is a compression effect,that leads to a measurable back-to-back correlation（ BBC） of boson-antiboson pairs. Since Φ has a unique singularity-anti-singular quark structure,we studied the BBC of Φ in this paper. First of all,it introduces the function of BBC,and then analyzes the influence of mass modification on BBC,finally discussed the relationship between BBC of Φ and the angle of transverse momentum for the particle and pseudo rapidity. The results indicate that BBC is different for different mass modification,the BBC of Φ is the largest when the angle of transverse momentum is π for boson-antiboson pairs. As the angle of transverse momentum decreases,BBC function decrease to 1 quickly,and the BBC function decrease with the increase of pseudo rapidity. The study on BBC of Φ is crucial to the further understanding of the properties of the quark-gluon plasma.

关 键 词：压缩关联 质量偏移 赝快度 

分 类 号：C934.1[经济管理—管理学]