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大型强子对撞机的喷注截面与更高精度的探索。

Jet cross sections at the LHC and the quest for higher precision.

作者信息

Bellm Johannes, Buckley Andy, Chen Xuan, Ridder Aude Gehrmann-De, Gehrmann Thomas, Glover Nigel, Höche Stefan, Huss Alexander, Huston Joey, Kuttimalai Silvan, Pires Joao, Plätzer Simon, Re Emanuele

机构信息

1Department of Astronomy and Theoretical Physics, Lund University, 223 62 Lund, Sweden.

2School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ UK.

出版信息

Eur Phys J C Part Fields. 2020;80(2):93. doi: 10.1140/epjc/s10052-019-7574-x. Epub 2020 Feb 5.

DOI:10.1140/epjc/s10052-019-7574-x
PMID:32089641
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7002464/
Abstract

We perform a phenomenological study of plus jet, Higgs plus jet and di-jet production at the Large Hadron Collider. We investigate in particular the dependence of the leading jet cross section on the jet radius as a function of the jet transverse momentum. Theoretical predictions are obtained using perturbative QCD calculations at the next-to and next-to-next-to-leading order, using a range of renormalization and factorization scales. The fixed order predictions are compared to results obtained from matching next-to-leading order calculations to parton showers. A study of the scale dependence as a function of the jet radius is used to provide a better estimate of the scale uncertainty for small jet sizes. The non-perturbative corrections as a function of jet radius are estimated from different generators.

摘要

我们对大型强子对撞机上的加喷注、希格斯加喷注和双喷注产生进行了唯象学研究。我们特别研究了领先喷注截面作为喷注半径的函数对喷注横向动量的依赖性。使用一系列重整化和因子化尺度，通过次领头阶和次次领头阶的微扰量子色动力学计算获得理论预测。将固定阶预测与通过将次领头阶计算与部分子淋浴匹配得到的结果进行比较。对作为喷注半径函数的尺度依赖性的研究用于对小喷注尺寸的尺度不确定性提供更好的估计。根据不同的发生器估计作为喷注半径函数的非微扰修正。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4a78/7002464/6db181efc1bb/10052_2019_7574_Fig20_HTML.jpg
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