论文标题
外壳动力学对运输属性的影响以及在RHIC和LHC温度下魅力夸克的动态演变
Impact of off-shell dynamics on the transport properties and the dynamical evolution of Charm Quarks at RHIC and LHC temperatures
论文作者
论文摘要
我们评估了将准粒子近似与QGP培养基的外壳组成和动态的准准粒子模型与有限温度下的外壳大型培养基进行比较的阻力传输系数。我们研究了Charm Quark Transports properties $ quark的粒子的宽度$γ$ quank的范围的效果。我们发现，脱壳效应通常是相当中等的，并且可以引起低矩处的阻力系数的降低，而在中度动量，$ p \ gtrsim 2-3 \，\ rm rm Gev $中已经消失了。我们还观察到有限动量的波动 - 散落定理（FDT）的破裂中等减少。 此外，我们已经对固定温度下的大量培养基中HQ弹性能量损失的动力学演变进行了首次研究，从而扩展了Boltzmann（BM）碰撞积分，以包括外壳动力学。 Langevin动力学的比较，BM碰撞的积分与壳体和BM扩展与外壳动力学的比较表明，当包含脱壳效应时，魅力能量的演变与On-Shell BM碰撞积分的情况非常相似。
We evaluate drag and diffusion transport coefficients comparing a quasi-particle approximation with on-shell constituents of the QGP medium and a dynamical quasi-particles model with off-shell bulk medium at finite temperature T. We study the effects of the width $γ$ of the particles of the bulk medium on the charm quark transport properties exploring the range where $γ< M_{q,g}$. We find that off-shell effects are in general quite moderate and can induce a reduction of the drag coefficient at low momenta that disappear already at moderate momenta, $p \gtrsim 2-3\, \rm GeV$. We also observe a moderate reduction of the breaking of the Fluctuation-Dissipation theorem (FDT) at finite momenta. Moreover, we have performed a first study of the dynamical evolution of HQ elastic energy loss in a bulk medium at fixed temperature extending the Boltzmann (BM) collision integral to include off-shell dynamics. A comparison among the Langevin dynamics, the BM collisional integral with on-shell and the BM extension to off-shell dynamics shows that the evolution of charm energy when off-shell effects are included remain quite similar to the case of the on-shell BM collision integral.
