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arXiv 1210.7610nucl-ex
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ALICE 2.76 TeV Pb Pb碰撞中的喷流结构

Jet structure in 2.76 TeV Pb Pb collisions at ALICE

ALICE Collaboration

摘要:

本文分析了在$\sqrt{s_{NN}}=2.76$ TeV的中心Pb-Pb碰撞中,由高pT强子触发反冲的重构带电粒子喷流的半包容分布。我们测量,减去和展开的大的潜在事件的背景下,这样的碰撞,利用一种新的技术,不施加碎片的偏见上测得的喷流人口。将Pb Pb测量值与在相同$\sqrt{s}$生成的pp PYTHIA参考分布进行比较。通过改变锥半径$R$(0.2,0.4)和带电粒子组分的较低pT截止值(0.15,2.0 GeV/ $c$),探索了由于淬灭而引起的喷流结构的修改。

英文摘要:

We present the analysis of the semi-inclusive distribution of reconstructed charged particle jets recoiling from a high pT hadron trigger in central Pb Pb collisions at $\sqrt{s_{NN}}=2.76$ TeV. We measure, subtract and unfold the large underlying event background in such collisions, utilizing a novel technique that does not impose fragmentation bias on the measured jet population. The Pb Pb measurements are compared to a pp PYTHIA reference distribution generated at the same $\sqrt{s}$. Modification of jet structure due to quenching is explored by varying the cone radius $R$ (0.2, 0.4) and the lower pT cutoff of charged particle constituents (0.15, 2.0 GeV/$c$).

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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