LHC上通过底夸克对产生在NNLO+PS精度下的底味喷注产生
The production of bottom-flavoured jets at the LHC through bottom-quark pair production at NNLO+PS
浏览论文内容
中文总结 AI 辅助
本文计算了LHC上通过底夸克对产生底味喷注的NNLO+PS修正,比较了不同喷注味定义,并与ATLAS、CMS和LHCb实验数据进行了验证。
中文摘要 AI 辅助
我们考虑了LHC上底味喷注的主要产生机制,该机制通过底夸克对产生进行。我们计算了保留完整底夸克质量效应的次次领头阶(NNLO)QCD修正,并将其与部分子簇射(NNLO+PS)匹配。我们的预言在部分子水平和强子水平上均提供了对含有一个和两个底味喷注的事件的现实描述。我们比较了不同的喷注味定义,并确认喷注算法之间主要的数值差异源于对由$g\ o b\ar b$劈裂产生的含两个底夸克的喷注的处理。我们使用实验上的底味标记方案,将我们的预言与ATLAS、CMS和LHCb在7和13 TeV下的测量结果进行比较,发现与ATLAS和CMS给出的分布符合良好,并且对LHCb数据的形状描述良好。我们还讨论了各种物理效应对所考虑分布的影响:底夸克质量中的幂次修正、对称/非对称喷注选择截断的影响,以及多部分子相互作用的贡献。
英文摘要
We consider the dominant production mechanism of bottom-flavoured jets at the LHC, which proceeds through bottom-quark pair production. We compute next-to-next-to- leading-order (NNLO) QCD corrections retaining full bottom-quark mass effects and match them with a parton shower (NNLO+PS). Our predictions provide a realistic description of events with one and two bottom-flavoured jets at both the partonic and hadronic level. We compare different jet-flavour definitions and confirm that the dominant numerical differences between the jet algorithms result from the treatment of jets that contain two bottom quarks originating from $g\to b\bar b$ splittings. We compare our predictions, using the experimental bottom-flavour tagging prescription, with measurements by ATLAS, CMS, and LHCb at 7 and 13 TeV, finding good agreement for the distributions presented by ATLAS and CMS and a good description of the shapes of the LHCb data. We also discuss the impact of various physics effects on the considered distributions: power corrections in the bottom-quark mass, the implications of symmetric/asymmetric jet-selection cuts, as well as contributions from multi-parton interactions.
发表机构
- Max-Planck-Institut für Physik(马克斯·普朗克物理研究所)
- Technische Universität München(慕尼黑工业大学)
- Fakultät Physik, Technische Universität Dortmund(多特蒙德大学物理学院)
机构由 AI 辅助整理,请以论文原文为准。