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arXiv 1111.2588nucl-ex
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158 $A$ GeV中心Pb+Pb碰撞中的反氘核和氘核产生

Antideuteron and deuteron production in mid-central Pb+Pb collisions at 158$A$ GeV

Tome Anticic, NA49 collaboration

摘要:

利用NA49实验研究了最中心23.5%的Pb+Pb碰撞中氘核和反氘核的产生,最高SPS能量为$\sqrt{s_{NN}}$ =17.3 GeV. $\bar{d}$和$d$的不变产额作为质心快度范围$-1.2<y<-0.6$的中心性的函数进行测量。结果$\bar{d}(d)$与以前发表的$\bar{p}(p)$测量的聚结模型的上下文中进行了讨论。推导了并合参数$B_2$与横向动量$p_t$和碰撞中心度的函数关系。

英文摘要:

Production of deuterons and antideuterons was studied by the NA49 experiment in the 23.5% most central Pb+Pb collisions at the top SPS energy of $\sqrt{s_{NN}}$=17.3 GeV. Invariant yields for $\bar{d}$ and $d$ were measured as a function of centrality in the center-of-mass rapidity range $-1.2<y<-0.6$. Results for $\bar{d}(d)$ together with previously published $\bar{p}(p)$ measurements are discussed in the context of the coalescence model. The coalescence parameters $B_2$ were deduced as a function of transverse momentum $p_t$ and collision centrality.

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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