高能重离子碰撞中$γ$触发喷流诱导的马赫锥
Mach cone induced by $γ$-triggered jets in high-energy heavy-ion collisions
摘要：
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M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射流是最强的，强子触发的射流通常产生于致密介质的表面附近，由于散射偏置，并且逆着径向流或与径向流相切。没有这样的触发偏置，偏转对$γ$喷流簇射及其介质激发的影响较弱。因此，对强子和$γ$触发的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的介质激发动力学。
英文摘要：
MMedium 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 gives rise to a double-peak azimuthal particle distribution with respect to the initial jet direction. Such deflection is the strongest for hadron-triggered jets which are often produced close to the surface of 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.
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