论文标题
在13 TEV处的LHC数据的情况下，最小和非最小的通用额外维度模型
Minimal and non-minimal Universal Extra Dimension models in the light of LHC data at 13 TeV
论文作者
论文摘要
通用额外尺寸（UED）是一个动机良好且研究良好的场景。主要动机之一是在UED的粒子谱中存在暗物质（DM）候选者，即最轻的1级Kaluza-Klein（KK）粒子（LKP）。 UED（MUED）方案的最小版本具有高度预测性，只有两个参数，即紧凑型和截止量表的半径，以确定现象学。因此，严格的约束来自宇宙DM遗物密度（RD）的WMAP/PLANCK测量。在UED场景中，在大型强子对撞机（LHC）实验中产生的最终状态。我们研究了ATLAS搜索多Julijet以及LHC上缺少横向能量的缺失，其中13个TEV质量能量中心和139个逆Femtobarn集成光度。鉴于Atlas Multijet搜索已经排除了DM RD允许的部分参数空间的一部分，我们继续使用较小的UED版本，即非少数UED（NMUED），具有非悬崖边界局限化项（BLTS）。 BLT的存在显着改变了暗物质以及对撞机的现象学。我们从Atlas Multijet以及缺失的横向能量搜索上获得了BLT参数的严格界限。
Universal Extra Dimension (UED) is a well-motivated and well-studied scenario. One of the main motivations is the presence of a dark matter (DM) candidate namely, the lightest level-1 Kaluza-Klein (KK) particle (LKP), in the particle spectrum of UED. The minimal version of UED (mUED) scenario is highly predictive with only two parameters namely, the radius of compactification and cut-off scale, to determine the phenomenology. Therefore, stringent constraint results from the WMAP/PLANCK measurement of DM relic density (RD) of the universe. The production and decays of level-1 quarks and gluons in UED scenarios give rise to multijet final states at the Large Hadron Collider (LHC) experiment. We study the ATLAS search for multijet plus missing transverse energy signatures at the LHC with 13 TeV center of mass energy and 139 inverse femtobarn integrated luminosity. In view of the fact that the DM RD allowed part of mUED parameter-space has already been ruled out by the ATLAS multijet search, we move on to a less restricted version of UED namely, the non-minimal UED (nmUED), with non-vanishing boundary-localized terms (BLTs). The presence of BLTs significantly alters the dark matter as well as the collider phenomenology of nmUED. We obtain stringent bounds on the BLT parameters from the ATLAS multijet plus missing transverse energy search.
