arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1607.01447nucl-exhep-exhep-phnucl-th
收藏

$\sqrt{s_{NN}}$ = 200 GeV Au+Au碰撞中的直接虚光子产生

Direct virtual photon production in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV

STAR Collaboration

摘要:

本文报道了在$\sqrt{s_{NN}}=200$ GeV的0- 80%最小偏压Au+Au碰撞中,由双电子不变质量连续区$0.10<M_{ee}<0.28$ GeV/$c^{2}$导出的中快度下横动量范围$1\!<\!p_{T}\!<\!3$ GeV/$c$和$5\!<\!p_T\!<\!10$ GeV/ $c$的直接虚光子不变产额.在$p_T$范围$1\!<\!p_{T}\!<\!3$ GeV/ $c$中,观察到与二进制碰撞数($N_{bin}$)定标的$p+p$参考相比,不变产率明显过量。对于$p_T\!>6$ GeV/ $c$,生产遵循$N_{bin}$缩放。模型计算的贡献,从热辐射和初始硬部分子散射是一致的不确定性与直接虚光子不变产额。

英文摘要:

We report the direct virtual photon invariant yields in the transverse momentum ranges $1\!<\!p_{T}\!<\!3$ GeV/$c$ and $5\!<\!p_T\!<\!10$ GeV/$c$ at mid-rapidity derived from the dielectron invariant mass continuum region $0.10<M_{ee}<0.28$ GeV/$c^{2}$ for 0-80\% minimum-bias Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV. A clear excess in the invariant yield compared to the number-of-binary-collisions ($N_{bin}$) scaled $p+p$ reference is observed in the $p_T$ range $1\!<\!p_{T}\!<\!3$ GeV/$c$. For $p_T\!>6$ GeV/$c$ the production follows $N_{bin}$ scaling. Model calculations with contributions from thermal radiation and initial hard parton scattering are consistent within uncertainties with the direct virtual photon invariant yield.

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。

↑