Liu Feng-Xian, She Zhi-Lei, Xu Hong-Ge, Zhou Dai-Mei, Chen Gang, Sa Ben-Hao
School of Mathematics and Physics, Hubei Polytechnic University, Huangshi, 435003 China.
School of Mathematics and Physics, China University of Geosciences, Wuhan, 430074 China.
Sci Rep. 2022 Feb 2;12(1):1772. doi: 10.1038/s41598-022-05584-2.
The nuclear modification factors ([Formula: see text]) of d and [Formula: see text] have been studied using the parton and hadron cascade model plus the dynamically constrained phase space coalescence model in peripheral (40-60%) and central (0-5%) Pb-Pb collisions at [Formula: see text] with [Formula: see text]. It is found that the [Formula: see text] of [Formula: see text] is similar to that of hadrons ([Formula: see text]) and the [Formula: see text] of antiparticles is the same as that of particles. The suppression effect of d is more significant than that of baryons and mesons in the high-[Formula: see text] region. The suppression of [Formula: see text] at high-[Formula: see text] strongly depends on event centrality and mass of the particles, i.e., the central collision is more suppressed than the peripheral collision. Besides, the yield ratios and double ratios for different particle species, and the coalescence parameter [Formula: see text] for ([Formula: see text]) in pp and Pb-Pb collisions are discussed, respectively. It is observed that the yield ratios and double ratios of d to p and p to [Formula: see text] are similar to those of their anti-particles in three different collision systems, suggesting that the suppressions of matter ([Formula: see text]) and the corresponding antimatter ([Formula: see text]) are around the same level.
利用部分子和强子级联模型以及动态约束相空间聚结模型，研究了在质心能量为(\sqrt{s_{NN}} = 2.76)TeV的周边（40 - 60%）和中心（0 - 5%）铅-铅碰撞中，氘核和反氘核的核修正因子（(R_{AA})）。研究发现，反氘核的(R_{AA})与强子的(R_{AA})相似，反粒子的(R_{AA})与粒子的(R_{AA})相同。在高横动量区域，氘核的抑制效应比重子和介子更显著。高横动量下反氘核的抑制强烈依赖于事件中心度和粒子质量，即中心碰撞比周边碰撞受到的抑制更强。此外，还分别讨论了不同粒子种类在质子-质子和铅-铅碰撞中的产额比、双比以及（反氘核）的聚结参数(B)。观察到在三种不同碰撞系统中，氘核与质子以及质子与反氘核的产额比和双比与其反粒子的相似，这表明物质（氘核）和相应反物质（反氘核）的抑制程度大致相同。
