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大型强子对撞机中通过圈诱导过程产生暗物质：s 通道媒介子情形。

Dark-matter production through loop-induced processes at the LHC: the s-channel mediator case.

作者信息

Mattelaer Olivier, Vryonidou Eleni

机构信息

Institute for Particle Physics Phenomenology (IPPP), Durham University, Durham, DH1 3LF UK.

Centre for Cosmology, Particle Physics and Phenomenology (CP3), Université catholique de Louvain, 1348 Louvain-la-Neuve, Belgium.

出版信息

Eur Phys J C Part Fields. 2015;75(9):436. doi: 10.1140/epjc/s10052-015-3665-5. Epub 2015 Sep 21.

DOI:10.1140/epjc/s10052-015-3665-5
PMID:26430384
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4581402/
Abstract

We show how studies relevant for mono-X searches at the LHC in simplified models featuring a dark-matter candidate and an -channel mediator can be performed within the MadGraph5_aMC@NLO framework. We focus on gluon-initiated loop-induced processes, mostly relevant to the case where the mediator couples preferentially to third generation quarks and in particular to the top quark. Our implementation allows us to study signatures at hadron colliders involving missing transverse energy plus jets or plus neutral bosons ([Formula: see text]), possibly including the effects of extra radiation by multi-parton merging and matching to the parton shower.

摘要

我们展示了如何在MadGraph5_aMC@NLO框架内，针对具有暗物质候选者和γ通道媒介子的简化模型，开展与大型强子对撞机上单X搜索相关的研究。我们聚焦于胶子引发的圈诱导过程，这主要与媒介子优先耦合到第三代夸克尤其是顶夸克的情况相关。我们的实现方法使我们能够研究强子对撞机上包含横向缺失能量加喷注或加中性玻色子（[公式：见正文]）的信号，可能还包括多部分子合并以及与部分子喷注匹配产生的额外辐射效应。

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