Impact of initial fluctuations and nuclear deformations in isobar collisions  

作　　者：Jian-Fei Wang Hao-Jie Xu Fu-Qiang Wang 

机构地区：[1]Department of Modern Physics,University of Science and Technology of China,Hefei 230026,China [2]School of Science,Huzhou University,Huzhou 313000,China [3]Strong-Coupling Physics International Research Laboratory(SPiRL),Huzhou University,Huzhou 313000,China [4]Department of Physics and Astronomy,Purdue University,West Lafayette,IN 47907,USA

出　　处：《Nuclear Science and Techniques》2024年第6期155-162,共8页核技术（英文）

基　　金：the National Natural Science Foundation of China(Nos.12275082,12035006,12075085(HX));the Zhejiang Provincial Natural Science Foundation of China(No.LY21A050001(HX));the U.S.Department of Energy(No.DE-SC0012910(FW)).

摘　　要：Relativistic isobar^(96)_(44)Ru+^(96)_(44)Ru and^(96)_(40)Zr+^(96)_(40)Zrcollisions have revealed intricate differences in their nuclear size and shape,inspiring unconventional studies of nuclear structure using relativistic heavy ion collisions.In this study,we investigate the relative differences in the mean multiplicityR_(<Nch>)and the secondR_(ε2)and third-order eccentricityR_(ε3)between isobar collisions using initial state Glauber models.It is found that initial fluctuations and nuclear deformations have negligible effects on R_(<Nch>)in most central collisions,while both are important for the R_(ε2)and R_(ε3),the degree of which is sensitive to the underlying nucleonic or sub-nucleonic degree of freedom.These features,compared to real data,may probe the particle production mechanism and the physics underlying nuclear structure.

关 键 词：Relativistic isobar collisions Initial fluctuations Nuclear deformation 

分 类 号：O571.6[理学—粒子物理与原子核物理] O412.1[理学—物理]