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arXiv 0910.3791hep-phhep-exnucl-th
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QCD喷流中平均多重数的准直

Collimation of average multiplicity in QCD jets

Francois Arleo, Redamy Perez Ramos

摘要:

在微扰QCD中,在修正的领先对数近似(MLLA)下研究了夸克喷注和胶子喷注内部平均多重数的准直性。高阶校正的作用占能量守恒和运行的耦合常数,导致较小的多重准直相比,领先的对数近似(LLA)的结果。还利用在红外区增强的介质修正分裂函数探讨了重离子碰撞中产生的喷流的准直性。与基元碰撞相比,在QCD介质中,喷注多重数的角分布在所有能量尺度上都变宽。

英文摘要:

The collimation of average multiplicity inside quark and gluon jets is investigated in perturbative QCD in the modified leading logarithmic approximation (MLLA). The role of higher order corrections accounting for energy conservation and the running of the coupling constant leads to smaller multiplicity collimation as compared to leading logarithmic approximation (LLA) results. The collimation of jets produced in heavy-ion collisions has also been explored by using medium-modified splitting functions enhanced in the infrared sector. As compared to elementary collisions, the angular distribution of the jet multiplicity is found to broaden in QCD media at all energy scales.

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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