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arXiv 0710.0605hep-phnucl-th
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RHIC夸克-胶子等离子体中的辐射和碰撞喷注能量损失

Radiative and Collisional Jet Energy Loss in the Quark-Gluon Plasma at RHIC

Guang-You Qin, Jorg Ruppert, Charles Gale, Sangyong Jeon, Guy D. Moore, Munshi G. Mustafa

摘要:

计算并比较了硬部分子穿过夸克-胶子等离子体时的韧致辐射和碰撞能量损失。我们的治疗这两个过程是完整的领先顺序的耦合和帐户的概率性质的喷气能量损失。我们发现,核修正因子$R_{AA}$中性$π^0$生产重离子碰撞是敏感的碰撞和辐射能量损失的贡献,而平均能量损失只有轻微增加,如果碰撞能量损失包括父部分子能量$E\gg T$。这些结果对于理解RHIC $200 {\rm AGeV}$ Au+Au碰撞中喷注猝灭的机制具有重要意义。与数据进行比较,应用能量损失计算的相对论理想的(3+1)维流体动力学描述的热化介质在RHIC形成。

英文摘要:

We calculate and compare bremsstrahlung and collisional energy loss of hard partons traversing a quark-gluon plasma. Our treatment of both processes is complete at leading order in the coupling and accounts for the probabilistic nature of the jet energy loss. We find that the nuclear modification factor $R_{AA}$ for neutral $π^0$ production in heavy ion collisions is sensitive to the inclusion of collisional and radiative energy loss contributions while the averaged energy loss only slightly increases if collisional energy loss is included for parent parton energies $E\gg T$. These results are important for the understanding of jet quenching in Au+Au collisions at $200 {\rm AGeV}$ at RHIC. Comparison with data is performed applying the energy loss calculation to a relativistic ideal (3+1)-dimensional hydrodynamic description of the thermalized medium formed at RHIC.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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