Mach cone induced by γ-triggered jets in high-energy heavy-ion collisions.
Mach cone induced by γ-triggered jets in high-energy heavy-ion collisions.
复制标题
DOI：
10.1103/physrevlett.106.012301
复制
发表时间：
2010-06
影响因子：
8.6
通讯作者：
Hanlin Li;Fuming Liu;G. Ma;Xin-Nian Wang;Yan Zhu
中科院分区：
文献类型：
--
作者：
Hanlin Li;Fuming Liu;G. Ma;Xin-Nian Wang;Yan Zhu
在线性玻尔兹曼输运和多相输运模型下研究了夸克胶子等离子体中喷流簇射传播对介质的激发。与天真的期望相反，它是偏转的射流簇射和马赫锥状激发在膨胀介质中，被发现引起一个双峰方位角粒子分布相对于初始射流方向。这种偏转对于强子触发的喷流是最强的，强子触发的喷流由于触发偏置而经常在致密介质的表面附近产生，并且与径向流相反或相切地行进。在没有这种触发偏压的情况下，偏转对γ喷注簇射及其介质激发的影响较弱。因此，强子和γ触发粒子关联的比较研究可以揭示高能重离子碰撞中喷注诱导介质激发的动力学。
Medium excitation by jet shower propagation inside a quark-gluon plasma is studied within a linear Boltzmann transport and a multiphase transport model. Contrary to the naive expectation, it is the deflection of both the jet shower and the Mach-cone-like excitation in an expanding medium that is found to give rise to a double-peak azimuthal particle distribution with respect to the initial jet direction. Such a deflection is the strongest for hadron-triggered jets which are often produced close to the surface of a dense medium due to trigger bias and travel against or tangential to the radial flow. Without such trigger bias, the effect of deflection on γ-jet showers and their medium excitation is weaker. Comparative study of hadron and γ-triggered particle correlations can therefore reveal the dynamics of jet-induced medium excitation in high-energy heavy-ion collisions.