标题： $D^{0}$和$D^{*}$在 STAR 实验中质子-质子碰撞下的产生测量，能量为$\sqrt{s}$ = 510 GeV 显示英文标题

标题： Measurements of $D^{0}$ and $D^{*}$ production in p+p collisions at $\sqrt{s}$ = 510 GeV in STAR experiment

摘要： 这些论文介绍了在相对论重离子对撞机（RHIC）的STAR实验中，质子-质子（p+p）碰撞的质心系能量为$\sqrt{s}$= 510 GeV时，$D^{0}$和$D^{*}$介子的横向动量函数的产生研究。本分析的目标是通过$D^{0}$和$D^{*}$测量得到的底夸克-反底夸克产生截面来检验微扰QCD计算。 本报告涵盖了 2017 年 STAR 实验中记录的最小偏压事件中 $D^{0}$ 和 $D^{*}$ 介子的信号提取工作。这些事件发生在 $\sqrt{s}$ = 510 GeV 的 p+p 碰撞中。 信号是通过这些介子的强子衰变通道重建的。 同号组合法和径迹旋转法已用于估算 $D^{0}$ 测量中从 $p_{T}$ = 0.0 到 2.1 GeV/$c$ 范围内的组合背景辐射。 对于$D^{*}$，错误符号和衰变子粒子的侧带组合被用来从$p_{T}$= 2.0 到 6.0 GeV/$c$重建组合背景。 显示英文摘要

摘要： These proceedings present an investigation into the production of $D^{0}$ and $D^{*}$ mesons as a function of transverse momentum in proton-proton (p+p) collisions at a center-of-mass energy of $\sqrt{s}$ = 510 GeV, in the STAR experiment at the Relativistic Heavy Ion Collider (RHIC). Objective of this analysis is to test the perturbative QCD calculations with the charm-anticharm production cross-sections obtained through $D^{0}$ and $D^{*}$ measurements. This report includes ongoing signal extractions of the $D^{0}$ and $D^{*}$ mesons from minimum bias events recorded during the p+p collisions at $\sqrt{s}$ = 510 GeV at STAR in 2017. Signals were reconstructed through the hadronic decay channels of these mesons. Like-sign combination and track rotation methods have been used to estimate the combinatorial background for $D^{0}$ measurement from $p_{T}$ = 0.0 to 2.1 GeV/$c$. For $D^{*}$, wrong-sign and side band combination of the decay daughters were utilized to reconstruct the combinatorial background from $p_{T}$ = 2.0 to 6.0 GeV/$c$.