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arXiv 2008.07622nucl-th
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在一种传输方法中重味喷流的研究

Study of heavy-flavor jets in a transport approach

Weiyao Ke, Xin-Nian Wang, Wenkai Fan, Steffen Bass

摘要:

在RHIC和LHC的测量中观察到了单强子抑制的味道依赖性,这揭示了夸克质量在部分子与夸克-胶子等离子体(QGP)介质相互作用中所起的作用。在这项研究中,我们探讨了夸克质量效应和味道依赖性在喷流观测中的表现。我们使用LIDO传输模型进行这项研究。弹性辐射过程和介质诱导辐射过程都用于介质中的硬部分子演化。为了保证能量-动量守恒的模型中的研究充分喷流可观的,我们还包括一个组件,模仿介质激发传输的能量-动量。我们首先预测了RHIC和LHC束流能量下中心核碰撞中的重喷流(B喷流、D喷流)和包含喷流核修正因子$R_{AA}$。我们观察到一个味道依赖的射流抑制射流横向动量的函数,这可以通过未来的精密测量重射流进行测试。我们进一步研究了一种新的观察,认为两个硬对象之间的角相关:D介子和射流,它提供了模型的约束,除了那些所施加的包容性测量。

英文摘要:

Measurements at the RHIC and the LHC have observed flavor dependence of single-hadron suppression, which reveal the role played by quark masses in the parton interactions with the quark-gluon plasma (QGP) medium. In this study, we explore the manifestation of quark mass effect and flavor dependence in jet observables. We approach this study using the LIDO transport model. Both elastic and medium-induced radiative processes are implemented for hard parton evolution in the medium. To guarantee energy-momentum conservation in the model for the study of full jet observables, we also include a component that mimics the energy-momentum transported by medium excitation. We first predict the heavy-jet (B-jet, D-jet) and inclusive-jet nuclear modification factor $R_{AA}$ in central nuclear collisions at both the RHIC and the LHC beam energies. We observe a flavor-dependent jet suppression as a function of jet transverse momentum, which can be tested by future precision measurements of heavy jets. We further investigate a novel observable that considers the angular correlation between two hard objects: a D-meson and a jet, which provides model constraints in addition to those imposed by inclusive measurements.

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