Yield ratio of hypertriton to light nuclei in heavy-ion collisions from = 4.9 GeV to 2.76 TeV * * The work of T.S. and J.C. was supported in part by the Strategic Priority Research Program of Chinese Academy of Sciences (XDB34030200) and the National Natural Science Foundation of China (11890710, 11775288, 11421505, 11520101004), while that of C.M.K. and K.J.S. was

Abstract

We argue that the difference in the yield ratio measured in Au+Au collisions at = 200 GeV and in Pb-Pb collisions at = 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 = 200 GeV. We then use the coalescence model to extract from measured the information about the and nucleon density fluctuations at the kinetic freeze-out of heavy-ion collisions. We also show, using available experimental data, that the yield ratio is a more promising observable than for probing the local baryon-strangeness correlation in the produced medium.