Correlations of baryon and charge stopping in heavy ion collisions  

作　　者：吕文棣 李洋 李子阳 马荣荣 唐泽波 Prithwish Tribedy Chun Yuen Tsang 许长补 查王妹 Wendi Lv;Yang Li;Ziyang Li;Rongrong Ma;Zebo Tang;Prithwish Tribedy;Chun Yuen Tsang;Zhangbu Xu;Wangmei Zha(State Key Laboratory of Particle Detection and Electronics,University of Science and Technology of China,Hefei 230026,China;Physics Department,Brookhaven National Laboratory,Upton,NY 11973,USA;Department of Physics,Kent State University,Kent,OH 44242,USA)

机构地区：[1]State Key Laboratory of Particle Detection and Electronics,University of Science and Technology of China,Hefei 230026,China [2]Physics Department,Brookhaven National Laboratory,Upton,NY 11973,USA [3]Department of Physics,Kent State University,Kent,OH 44242,USA

出　　处：《Chinese Physics C》2024年第4期89-94,共6页中国物理C（英文版）

基　　金：the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB34030000);the National Key Research and Development Program of China(2022YFA1604900);the U.S.DOE Office of Science365 under contract(DE-SC0012704,DE-FG02-10ER41666,DE-AC02-98CH10886)。

摘　　要：Baryon numbers are theorized to be carried by valence quarks in the standard QCD picture of the baryon structure.Another theory proposed an alternative baryon number carrier,a non-perturbative Y-shaped configuration of the gluon field,called the baryon junction in the 1970s.However,neither of these theories has been verified experimentally.Recently,searching for the baryon junction by investigating the correlation of net-charge and net-baryon yields at midrapidity in heavy-ion collisions has been suggested.This paper presents studies of such correlations in collisions of various heavy ions from oxygen to uranium with the UrQMD Monte Carlo model.The UrQMD model implements valence quark transport as the primary means of charge and baryon stopping at midrapidity.Detailed studies are also conducted for isobaric ^(96)_(40)Zr+^(96)_(40)Zr and ^(96)_(44)Ru+^(96)_(44)Ru collisions.We found a universal trend of charge stopping with respect to baryon stopping and discovered that the charge stopping is always greater than the baryon stopping.This study provides a model baseline in valence quark transport for what is expected in net-charge and net-baryon yields at the midrapidity of relativistic heavy-ion collisions.

关 键 词：baryon junction baryon number carrier baryon stopping relativistic heavy ion collisions 

分 类 号：O571.6[理学—粒子物理与原子核物理]