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arXiv 0907.4788nucl-ex
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RHIC重离子碰撞中全喷注重建的喷流结构和碎裂测量

Measurements of jet structure and fragmentation from full jet reconstruction in heavy ion collisions at RHIC

Elena Bruna

摘要:

包含强子抑制和双强子方位角关联的测量为热QCD物质中的喷注猝灭提供了重要的见解。然而,它们不能提供硬散射能量的获取,并且灵敏度有限,因为它们可能会受到硬碎片和小能量损失的偏差的影响。重离子碰撞中的全喷注重建能够完整地研究由于能量损失而引起的喷注结构的改变,但由于高多重数环境而具有挑战性。我们目前的测量完全重建的双喷流在中快度在200 GeV的p+p和中央金+金碰撞进行的STAR探测器。我们比较了200 GeV的p+p和中心Au+Au碰撞测量的碎裂函数,并评估其比值的系统不确定性。

英文摘要:

Measurements of inclusive hadron suppression and di-hadron azimuthal correlations have provided important insights into jet quenching in hot QCD matter. However, they do not provide access to the energy of the hard scattering and are limited in their sensitivity since they can be affected by biases toward hard fragmentation and small energy loss. Full jet reconstruction in heavy-ion collisions enables a complete study of the modification of jet structure due to energy loss, but is challenging due to the high-multiplicity environment. We present measurements of fully reconstructed di-jets at mid-rapidity in 200 GeV p+p and central Au+Au collisions performed with the STAR detector. We compare fragmentation functions measured in 200 GeV p+p and central Au+Au collisions and assess the systematic uncertainties of their ratio.

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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