Yield ratio of hypertriton to light nuclei in heavy-ion collisions from √SNN= 4.9 GeV to 2.76 TeV

• 来源期刊: 中国物理C（英文版）
• 年，卷（期）: 2020,（11）
• 所属期刊栏目: NUCLEAR PHYSICS
• 页码范围: 86-93
• 页数: 8页
• 语种: 英文
• DOI: 10.1088/1674-1137/abadf0

摘要

We argue that the difference in the yield ratio S3 =N3ΛH/NΛ/N3He/Np measured in Au+Au collisions at √SNN =200 GeV and in Pb-Pb collisions at √SNN = 2.76 TeV is mainly owing to the different treatment of the weak decay contribution to the proton yield in the Au+Au collisions at √SNN = 200 GeV.We then use the coalescence model to extract from measured S3 the information about the Λ and nucleon density fluctuations at the kinetic freeze-out of heavy-ion collisions.We also show,using available experimental data,that the yield ratio S2=N3ΛH/NΛNd is a more promising observable than S3 for probing the local baryon-strangeness correlation in the produced medium.