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arXiv 2112.09545hep-phhep-ex
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LHC喷流角的现象学

Phenomenology of jet angularities at the LHC

Daniel Reichelt, Simone Caletti, Oleh Fedkevych, Simone Marzani, Steffen Schumann, Gregory Soyez

摘要:

我们计算的预测和匹配的强子dijet和Z+喷流事件的喷流角,并没有使用SoftDrop技术梳理候选喷流。我们的理论预测还占非微扰校正的基础事件和强子化通过部分强子级转移矩阵提取专用蒙特卡罗模拟与SHERPA。由于这种方法,我们可以考虑非微扰迁移的角度和射流横向动量的影响。我们将我们的预测与CMS实验的最新测量结果进行比较。这使我们能够分别测试夸克喷注和胶子喷注富集相空间区域的描述。我们补充我们的研究与SHERPA结果的基础上匹配的NLO QCD矩阵元素的部分子簇射。这两个理论预测提供了一个很好的描述的数据,在实验和理论的不确定性。然而,后者是相当大的,激励更高精度的计算。

英文摘要:

We compute resummed and matched predictions for jet angularities in hadronic dijet and Z+jet events with and without grooming the candidate jets using the SoftDrop technique. Our theoretical predictions also account for non-perturbative corrections from the underlying event and hadronisation through parton-to-hadron level transfer matrices extracted from dedicated Monte Carlo simulations with SHERPA. Thanks to this approach we can account for non-perturbative migration effects in both the angularities and the jet transverse momentum. We compare our predictions against recent measurements from the CMS experiment. This allows us to test the description of quark- and gluon-jet enriched phase-space regions separately. We supplement our study with SHERPA results based on the matching of NLO QCD matrix elements with the parton shower. Both theoretical predictions offer a good description of the data, within the experimental and theoretical uncertainties. The latter are however sizeable, motivating higher-accuracy calculations.

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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