HYDJET++模型中硬过程和软过程的相互作用

E. Zabrodin, L. Bravina, G. Eyyubova, I. Lokhtin, L. Malinina, S. Petrushanko, A. Snigirev
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引用次数: 0

摘要

蒙特卡罗事件生成器HYDJET++(流体力学与射流)通过将参数化流体力学与射流处理相结合,包含了相对论重离子碰撞软、硬过程的描述。硬软过程的相互作用描述了介子和重子在中间横动量下的椭圆流和三角流的质量层次的破坏,在一定的p_T阈值后的流谐波的衰减,以及在LHC能量下的v_2和v_3的成分夸克数标度比RHIC能量下的更差。本文还讨论了在RHIC和LHC能量重离子碰撞中,这种相互作用在双强子相关和开放和隐藏粲子产生中的作用。
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Interplay between hard and soft processes in HYDJET++ model
The Monte Carlo event generator HYDJET++ (HYDrodynamics with JETs) contains the description of both soft and hard processes in relativistic heavy-ion collisions by combining the parametrized hydrodynamics with the treatment of jets. The interplay of hard and soft processes describes the violation of the mass hierarchy of meson and baryon elliptic $(v_2)$ and triangular $(v_3)$ flows at intermediate transverse momenta, the fall-off of the flow harmonics after the certain $p_T$ threshold, and the worsening of the number-of-constituent-quark (NCQ) scaling of $v_2$ and $v_3$ at LHC energies compared to that at RHIC ones. The role of this interplay in di-hadron correlations and in production of open and hidden charm in heavy-ion collisions at RHIC and LHC energies is also discussed.
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