arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0910.4844nucl-thhep-ph
收藏

在CERN大型强子对撞机可用能量下pp碰撞中的椭圆流($v_2$):流体动力学方法

Elliptic flow ($v_2$) in pp collisions at energies available at the CERN Large Hadron Collider: A hydrodynamical approach

S. K. Prasad, Victor Roy, S. Chattopadhyay, A. K. Chaudhuri

摘要:

在大型强子对撞机的能量,预期的大的多重性表明,即使在pp碰撞的集体行为的存在。一个流体动力学的方法已被应用到估计预期的椭圆流测量的方位角不对称参数$v_2$,在pp碰撞在$\surd$ s = 14 TeV。发现$π^-$的$v_2$强烈依赖于质子内部的部分子密度分布[例如,表面扩散参数($ξ$)]。对于$ξ$ = 0.105,发现$v_2$为正,而在$ξ$ = 0.25时,$v_2$接近于零,并且在大的$p_t$时接近负值。还研究了$v_2$的碰撞参量依赖性。

英文摘要:

At Large Hadron Collider energy, the expected large multiplicities suggests the presence of collective behavior even in pp collisions. A hydrodynamical approach has been applied to estimate the expected elliptic flow measured by the azimuthal asymmetry parameter $v_2$, in pp collisions at $\surd$s = 14 TeV. $v_2$ of $π^-$ is found to be strongly dependent on the parton density profile inside a proton [e.g., surface diffuseness parameter ($ξ$)]. For $ξ$ = 0.105, $v_2$ is found to be positive while at $ξ$ = 0.25, $v_2$ is close to zero and approaches negative values at large $p_t$. The impact parameter dependence of $v_2$ has also been studied.

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。

↑