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arXiv 1107.0340hep-phnucl-th
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在RHIC和LHC的pQCD的三强子角关联

Three-hadron angular correlations from pQCD at RHIC and LHC

Alejandro Ayala, Jamal Jalilian-Marian, Antonio Ortiz, Guy Paic, J. Magnin, Maria Elena Tejeda-Yeomans

摘要:

本文研究了RHIC和LHC中快度高能质子-质子和中心核-核碰撞中的三强子方位角关联。我们使用LO部分子矩阵元的2 \rightarrow 3过程,包括部分子能量损失的影响,在夸克-胶子等离子体使用修改的碎裂函数方法。对于产生的强子动量相同或相差不大的情况,我们观察到两个远离的侧峰在2 π/3和4 π/3。我们考虑了角关联对能量损失参数的依赖性,这些参数已被用于RHIC单包容强子产生的研究。我们的结果的角度依赖的截面同意与初步数据的PHENIX合作。我们评论的可能贡献2 \rightarrow 3过程双强子角相关性和如何比较这两个过程可能有助于进一步表征等离子体。

英文摘要:

We study three-hadron azimuthal angular correlations in high energy proton-proton and central nucleus-nucleus collisions at RHIC and LHC at mid-rapidity. We use the LO parton matrix elements for 2 \rightarrow 3 processes and include the effect of parton energy loss in the Quark-Gluon Plasma using the modified fragmentation function approach. For the case when the produced hadrons have either same or not too different momenta, we observe two away side peaks at 2pi/3 and 4pi/3. We consider the dependence of the angular correlations on energy loss parameters that have been used in studies of single inclusive hadron production at RHIC. Our results on the angular dependence of the cross section agree well with preliminary data by the PHENIX collaboration. We comment on the possible contribution of 2 \rightarrow 3 processes to di-hadron angular correlations and how a comparison of the two processes may help characterize the plasma further.

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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