论文标题
$ \ sqrt {s_ \ mathrm {nn}} $ = 3 GEV的质子数累积的质子编号累积的质子编号累积量的质子编号累积的影响
Effects of centrality fluctuation and deuteron formation on proton number cumulant in Au+Au collisions at $\sqrt{s_\mathrm{NN}}$ = 3 GeV from JAM model
论文作者
论文摘要
我们研究了中心性波动和杜特龙形成对累积物（$ c_n $）的影响（$ c_n $）以及质子的相关功能（$κ_n$）在大多数中心（$ b <3 $ fm）au+au碰撞$ \ sqrt {s_ \ mathrm {nnn} $ collm collision中的第六阶（$ b <3 $ fm+au+au碰撞）结果是作为横向动量$ 0.4 <p_ {t} <2 $ gev/$ c $的速度接受的函数。我们使用带电的参考粒子多重性与使用撞击参数箱进行的CBWC比较了通过中心箱宽度校正（CBWC）获得的结果。已经发现，在低能量下，使用带电的粒子多重性确定碰撞中心性的中心性分辨率不足以减少初始体积波动的效应，以进行高阶累积分析。需要开发新的方法来对低能量下重离子碰撞的高中心分辨率进行分类。最后，我们观察到，迪特龙的形成将抑制质子的高阶累积和相关函数，并被发现与效率效应相似。这项工作可以用作高baryon密度区域的QCD临界点搜索的非关键基线。
We studied the effects of centrality fluctuation and deuteron formation on the cumulants ($C_n$) and correlation functions ($κ_n$) of protons up to sixth order in most central ($b<3$ fm) Au+Au collisions at $\sqrt{s_\mathrm{NN}}$ = 3 GeV from a microscopic transport model (JAM). The results are presented as a function of rapidity acceptance within transverse momentum $0.4<p_{T}<2 $ GeV/$c$. We compared the results obtained by centrality bin width correction (CBWC) using charged reference particle multiplicity with CBWC done using impact parameter bins. It was found that at low energies the centrality resolution for determining the collision centrality using charged particle multiplicities is not good enough to reduce the initial volume fluctuations effect for higher-order cumulant analysis. New methods need to be developed to classify events with high centrality resolution for heavy-ion collisions at low energies. Finally, we observed that the formation of deuteron will suppress the higher-order cumulants and correlation functions of protons and is found to be similar to the efficiency effect. This work can serve as a noncritical baseline for the QCD critical point search at the high baryon density region.
