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arXiv 0908.0361nucl-thhep-ph
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RHIC的重夸克动态复合和非光子单电子之谜

Dynamical heavy-quark recombination and the non-photonic single electron puzzle at RHIC

Alejandro Ayala, J. Magnin, Luis Manuel Montano, G. Toledo Sanchez

摘要:

结果表明,相对于质子-质子碰撞,相对论性重离子碰撞中的单电子非光子核修正因子$R_{AA}^e$受到重子与重介子比的热增强的影响.我们利用动力学夸克复合模型来计算这样的比例,并表明这产生了相当大的抑制因子$R_{AA}^e$在中间横动量。我们认为,这种抑制因子需要考虑,除了能量损失的贡献,在计算$R_{AA}^e$

英文摘要:

We show that the single, non-photonic electron nuclear modification factor $R_{AA}^e$ is affected by the thermal enhancement of the heavy-baryon to heavy-meson ratio in relativistic heavy-ion collisions with respect to proton-proton collisions. We make use of the dynamical quark recombination model to compute such ratio and show that this produces a sizable suppression factor for $R_{AA}^e$ at intermediate transverse momenta. We argue that such suppression factor needs to be considered, in addition to the energy loss contribution, in calculations of $R_{AA}^e$

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