Role of QCD monopoles in jet quenching
Role of QCD monopoles in jet quenching
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DOI：
10.1103/physrevd.97.016010
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发表时间：
2017-08
影响因子：
5
通讯作者：
Adith Ramamurti;E. Shuryak
中科院分区：
文献类型：
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作者：
Adith Ramamurti;E. Shuryak
QCD单极子是一种带磁的准粒子，其玻色-爱因斯坦凝聚(BEC)在T T_c是导致QGP异常动力学性质的原因。在本文中，我们利用BDMPS框架和流体动力学背景，研究了单极子对喷流猝灭现象的贡献。在截面的最低阶中，我们计算了喷流的核修正因子$R_\Text{AA}和方位各向异性$v_2$，以及双喷流不对称性$A_j$，并将其与已有的数据进行了比较。当使用真实的流体动力学背景时，我们发现与实验有较好的一致性。此外，我们发现逐个事件的涨落不是复制$R_\TEXT{AA}$和$V_2$数据所必需的，而是在$A_j$中起作用。由于单极诱导效应在T约为T_c时最大，我们预测在较低的RHIC能量下，它们的作用应该比夸克和胶子大得多。
QCD monopoles are magnetically charged quasiparticles whose Bose-Einstein condensation (BEC) at $T T_c$ is responsible for the unusual kinetic properties of QGP. In this paper, we study the contribution of the monopoles to jet quenching phenomenon, using the BDMPS framework and hydrodynamic backgrounds. In the lowest order for cross sections, we calculate the nuclear modification factor, $R_\text{AA},$ and azimuthal anisotropy, $v_2$, of jets, as well as the dijet asymmetry, $A_j$, and compare those to the available data. We find relatively good agreement with experiment when using realistic hydrodynamic backgrounds. In addition, we find that event-by-event fluctuations are not necessary to reproduce $R_\text{AA}$ and $v_2$ data, but play a role in $A_j$. Since the monopole-induced effects are maximal at $T\approx T_c$, we predict that their role should be significantly larger, relative to quarks and gluons, at lower RHIC energies.