arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1607.05862hep-ph
收藏

LHC的tWH相关生产

tWH associated production at the LHC

Federico Demartin, Benedikt Maier, Fabio Maltoni, Kentarou Mawatari, Marco Zaro

摘要:

我们研究了在大型强子对撞机上,希格斯玻色子与顶夸克和$W$玻色子的产生。在QCD的NLO中,$tWH$干扰了$t\bar t H$,需要采用一个有意义地分离这两个过程的程序。为了定义$tWH$生产的总速率和差分分布,我们考虑的图删除和图减法技术,已经提出了治疗中间共振在NLO,特别是在上下文中的$tW$生产。这些技术的特点是近似,需要仔细考虑时,理论预测与实验测量进行比较。为了这个目的,我们首先批判性地重新审视$tW$过程,其中存在大量的文献,并与$t \bar t$生产发生类似的干扰。然后,我们提供了强大的$tW$和$tWH$在13 TeV的总截面和微分截面的结果,也匹配短距离事件的部分子淋浴。我们制定了一个可靠的处方来估计理论的不确定性,包括那些相关的非常定义的过程中NLO。最后,我们研究了在$tWH$产生过程中,Higgs与顶夸克和$W$玻色子之间的耦合对非标准模型相对相位的敏感性。

英文摘要:

We study Higgs boson production in association with a top quark and a $W$ boson at the LHC. At NLO in QCD, $tWH$ interferes with $t\bar t H$ and a procedure to meaningfully separate the two processes needs to be employed. In order to define $tWH$ production for both total rates and differential distributions, we consider the diagram removal and diagram subtraction techniques that have been previously proposed for treating intermediate resonances at NLO, in particular in the context of $tW$ production. These techniques feature approximations that need to be carefully taken into account when theoretical predictions are compared to experimental measurements. To this aim, we first critically revisit the $tW$ process, for which an extensive literature exists and where an analogous interference with $t \bar t$ production takes place. We then provide robust results for total and differential cross sections for $tW$ and $tWH$ at 13 TeV, also matching short-distance events to a parton shower. We formulate a reliable prescription to estimate the theoretical uncertainties, including those associated to the very definition of the process at NLO. Finally, we study the sensitivity to a non-Standard-Model relative phase between the Higgs couplings to the top quark and to the $W$ boson in $tWH$ production.

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。

↑