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arXiv 1003.5508nucl-th
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大型强子对撞机上夸克-胶子等离子体中重夸克的拖曳

Dragging Heavy Quarks in Quark Gluon Plasma at the Large Hadron Collider

Santosh K Das, Jan-e Alam, Payal Mohanty

摘要:

在大型强子对撞机(LHC)上计算了粲夸克和底夸克在夸克-胶子等离子体(QGP)中的阻力系数和扩散系数。考虑了死锥效应和朗道-波默龙丘克-米格达尔效应对重夸克辐射能量损失的影响。能量损失的辐射和碰撞过程都包括在{ \it有效}阻力和扩散系数中。利用这些有效输运系数,我们求解了在QGP中进行布朗运动的重夸克的Fokker Plank(FP)方程。本文用FP方程的解计算了含粲夸克和底夸克的强子半轻子衰变产生的非光子单电子谱的核抑制因子$R_{\mathrm AA}$。质量对$R_{\mathrm AA}$的影响也得到了强调。

英文摘要:

The drag and diffusion coefficients of charm and bottom quarks propagating through quark gluon plasma (QGP) have been evaluated for conditions relevant to nuclear collisions at Large Hadron Collider (LHC). The dead cone and Landau-Pomeronchuk-Migdal (LPM) effects on radiative energy loss of heavy quarks have been considered. Both radiative and collisional processes of energy loss are included in the {\it effective} drag and diffusion coefficients. With these effective transport coefficients we solve the Fokker Plank (FP) equation for the heavy quarks executing Brownian motion in the QGP. The solution of the FP equation has been used to evaluate the nuclear suppression factor, $R_{\mathrm AA}$ for the non-photonic single electron spectra resulting from the semi-leptonic decays of hadrons containing charm and bottom quarks. The effects of mass on $R_{\mathrm AA}$ has also been highlighted.

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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