arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0907.3548nucl-th
收藏

热光子椭圆流中QGP的形成时间

Formation Time of QGP from Thermal Photon Elliptic Flow

Rupa Chatterjee, Dinesh K. Srivastava

摘要:

研究表明,在RHIC \cite{tau}中,金核半中心碰撞中热光子的横向动量依赖椭圆流$v_2(p_T)$对夸克-胶子等离子体(QGP)的初始形成时间($τ_0$)非常敏感.形成时间越小或初始温度越高,$v_2$越小的QGP相的热光子辐射越大。在中高$p_T$范围内,热光子的椭圆流主要由夸克物质的贡献所控制,因此对于$p_T \ge 1.5$ GeV,$v_2$和随着$τ_0$的减小而减小.另一方面,我们发现强子的椭圆流参数仅在很小程度上依赖于$τ_0$的值。

英文摘要:

We show that the transverse momentum dependent elliptic flow $v_2(p_T)$ of thermal photons is quite sensitive to the initial formation time ($τ_0$) of Quark Gluon Plasma (QGP) for semi-central collision of gold nuclei at RHIC \cite{tau}. A smaller value of the formation time or a larger initial temperature leads to a significant increase in the thermal photon radiation from QGP phase, which has a smaller $v_2$. The elliptic flow of thermal photon is dominated by the contribution from the quark matter at intermediate and high $p_T$ range and as a result sum $v_2$ decreases with smaller $τ_0$ for $p_T \ge 1.5$ GeV. On the other hand we find that the elliptic flow parameter for hadrons depends only marginally on the value of $τ_0$.

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。

↑