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arXiv 2412.00510nucl-exhep-exnucl-th
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STAR BES-II计划中Au+Au碰撞中的轻核产生

Production of Light Nuclei in Au+Au Collisions with the STAR BES-II Program

Yixuan Jin

AI总结:

本研究基于STAR BES-II计划的大数据集和增强探测器能力,测量Au+Au碰撞中轻核的横动量谱、产额及相关比值,以区分热模型与并合模型,探索QCD相图临界现象。

摘要:

重离子碰撞中轻核的产额和比值为区分热模型和并合模型提供了一种方法。$\rm N_t \times N_p/N_d^2$和$\rm N_{^3He} \times N_p/N_d^2$等比值被认为是研究QCD相图内临界现象的潜在探针。STAR BES-II的数据集远大于BES-I,结合探测器能力的增强,可实现更精确的测量。本文中,我们展示了BES-II能量下($\sqrt{s_{\rm NN}}$ = 7.7 - 27 GeV)(反)质子、(反)氘核和$\rm ^3He$的横动量谱及粒子产额的中心度和能量依赖性,以及轻核与质子的产额比和并合参数($B_2(\rm d)$和$B_3(\rm ^3He)$)。

英文摘要:

The yields and ratios of light nuclei in heavy-ion collisions offer a method to distinguish between the thermal and coalescence models. Ratios such as $\rm N_t \times N_p/N_d^2$ and $\rm N_{^3He} \times N_p/N_d^2$ are suggested as potential probes to investigate critical phenomena within the QCD phase diagram. The significantly larger datasets from STAR BES-II compared to BES-I, combined with enhanced detector capabilities, allow for more precise measurements. In this proceeding, we present the centrality and energy dependence of transverse momentum spectra and particle yields of (anti-)proton, (anti-)deuteron, and $\rm ^3He$ at BES-II energies ($\sqrt{s_{\rm NN}}$ = $7.7 - 27$ GeV), as well as the light nuclei to proton yield ratios and coalescence parameters $(B_2(\rm d)$ and $B_3(\rm ^3He))$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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