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arXiv 2210.04592hep-phhep-ex
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低横动量包含喷流截面对pp碰撞中胶子部分子分布测定的影响

Impact of inclusive jet cross sections with low transverse momenta on the determination of gluon parton distributions in pp collisions

Deniz Sunar Cerci, Salim Cerci, Katarzyna Wichmann

摘要:

强子对撞机产生的喷流对质子的部分子分布函数,特别是胶子分布提供了约束。本文研究了微扰量子色动力学(QCD)中次超前阶下,质心能量为$\sqrt s = 8$ TeV,向前产生的低动量$p\mathrm{_T}$喷流的CMS包容微分喷流截面对PDF的影响. QCD整体分析的结果与理论预测进行了比较。低$p\mathrm{_T}$喷流测量的胶子分布的测定的影响进行了评估。包括所讨论的测量增加了进一步的约束在大比约肯$x > 0.1$,低$p_T$数据的影响最大的胶子分布的不确定性。

英文摘要:

Jet production at hadron colliders provides constraints on the parton distribution functions (PDFs) of the proton, in particular on the gluon distribution. In the present paper, the impact on PDF of CMS inclusive differential jet cross sections at center-of-mass energy of $\sqrt s = 8$ TeV for jets with low momentum $p\mathrm{_T}$ and produced in the forward direction is investigated at next-to leading order in perturbative quantum chromodynamics (QCD). The results of the QCD global analysis are compared with theoretical predictions. The impact of low-$p\mathrm{_T}$ jet measurements on the determination of the gluon distribution is assessed. The inclusion of the discussed measurements adds further constraints on the uncertainty of the gluon distribution at large Bjorken $x > 0.1$, where the low-$p_T$ data have the largest impact.

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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