论文标题
在LHC探测暗物质
Probing Dark Matter with Disappearing Tracks at the LHC
论文作者
论文摘要
由于暗物质的一部分是电动质量的带电寿命,而暗物质是具有宏观寿命的电动颗粒的一部分。在大型强子对撞机上,地图集和CMS实验将把这些带电的颗粒识别为消失的轨道,因为它们会腐烂成巨大的无形暗物质候选者,并且是一个非常柔软的带电标准模型粒子,无法通过重建要求。尽管Atlas和CM的重点是这些场景的超对称版本,但我们在这里进行了重新诠释,最新的Atlas消失了轨迹搜索,以搜索具有不同的旋转和electroweak量子数量的暗物质多重型。更具体地说,我们考虑了最小效率暗物质(MFDM)和矢量三重态暗物质(VTDM)的惰性两个Higgs Doublet模型(I2HDM)的情况。通过使用Atlas Collaporation采用的相同Wino和Higgsino基准模型来验证我们的程序。我们发现,随着轨道签名的消失,人们可以探究参数空间的大部分,远远超出了迅速缺失的能量搜索(尤其是单季)的范围。我们为横截面上限上的上限提供表格,并为所有正在考虑的模型提供寿命 - 暗物质质量平面的效率。此外,作为LLP重铸造库的一部分,我们将此处公开使用的重铸代码公开使用。
Models where dark matter is a part of an electroweak multiplet feature charged particles with macroscopic lifetimes due to the charged-neutral mass split of the order of pion mass. At the Large Hadron Collider, the ATLAS and CMS experiments will identify these charged particles as disappearing tracks, since they decay into a massive invisible dark matter candidate and a very soft charged Standard-Model particle which fails to pass the reconstruction requirements. While ATLAS and CMS have focused on the supersymmetric versions of these scenarios, we have performed here the reinterpretation of the latest ATLAS disappearing track search for a suite of dark matter multiplets with different spins and electroweak quantum numbers. More concretely, we consider the cases of the inert Two Higgs Doublet model (i2HDM), of Minimal Fermion Dark Matter (MFDM) and of Vector Triplet Dark Matter (VTDM). Our procedure is validated by using the same wino and higgsino benchmark models employed by the ATLAS collaboration. We have found that with the disappearing track signature one can probe a vast portion of the parameter space, well beyond the reach of prompt missing energy searches (notably mono-jets). We provide tables with the upper-limits on the cross-section upper limits, and efficiencies in the lifetime - dark matter mass plane for all the models under consideration. Moreover we make the recasting code employed here publicly available, as part of the LLP Recasting Repository.