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arXiv 2008.05265hep-phnucl-th
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$\sqrt{s_{NN}}$ = 5.02 TeV的$p$ +Pb碰撞中D介子核抑制的中心性依赖

Centrality dependence of nuclear suppression of D mesons in $p$+Pb collisions at $\sqrt{s_{NN}}$ = 5.02 TeV

Srikanta Kumar Tripathy, Mohammed Younus, Sudipan De

摘要:

本文对$\sqrt{s_{NN}}$ = 5.02TeV的$p$ +Pb碰撞中的平均D介子(DPDMATHABMM,DPDMATHABMN,DPDMATHABMO和$D^+_s$)在不同中心度下的理论模型与ALICE结果进行了比较.利用AMPT的输运计算和重夸克pQCD模型NLO(MNR)的计算,从D介子的碰撞中心性($\displaystyle{Q_{pPb}}$)和中心-周边比($\displaystyle{Q_{cp}}$)两个方面研究了与$p_T$有关的核修改因子.结果表明,采用参数化的$\displaystyle{k_T}$展宽方案的NLO模型得到的结果与已发表的$p$ +Pb碰撞的ALICE数据非常吻合.同样,AMPT输运计算结果显示出很强的中心依赖性,但低估了实验数据。讨论了两种模型与实验数据的差异。

英文摘要:

In this paper we have shown theoretical model comparisons with ALICE results for average D mesons (D$^0$, D$^+$, D$^{*+}$ and $D^+_s$) in $p$+Pb collisions at $\sqrt{s_{NN}}$ = 5.02 TeV for various centralities. Transport calculations of AMPT and calculations from heavy quark pQCD model, NLO(MNR) have been used for the study of $p_T$ dependent nuclear modification factors in terms of collision centrality ($\displaystyle{Q_{pPb}}$) and the central-to-peripheral ratios ($\displaystyle{Q_{cp}}$) of D mesons. It is found that NLO model with its parametrized $\displaystyle{k_T}$ broadening scheme produces results those closely match with the published D-meson data of $p$+Pb collisions from ALICE. Likewise AMPT transport calculation shows a strong centrality dependence in results but underestimates the experimental data. The differences of both models with experimental data have been discussed.

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