论文标题
在$ \ sqrt {s} $ = 13 tev中搜索在质子 - 普罗顿碰撞中腐烂的长寿命粒子
Search for long-lived particles decaying to a pair of muons in proton-proton collisions at $\sqrt{s}$ = 13 TeV
论文作者
论文摘要
提出了对长寿命的外来颗粒的包容性搜索。该搜索使用CMS实验在CERN LHC收集的质子proton碰撞的数据，$ \ sqrt {s} $ = 13 TEV在2016年和2018年，对应于97.6 fb $^{ - 1} $的集成亮度。实验签名是一对源自与PP相互作用点的公共二级顶点的相对电荷的MUON，该顶点的距离从几百$ $ m $ m到几米。结果是在隐藏的Abelian Higgs模型的框架中解释的，其中Higgs Boson腐烂到一对长寿命的深色光子Z $ _ \ Mathrm {d} $以及简化的模型，该模型在其中产生了长期寿命的颗粒，它们是在一个外来的外来型重型中性的中性鳞片中的衰减中产生的。对于具有$ M_ \ Mathrm {Z_D} $大于20 GEV的隐藏的Abelian Higgs模型，大于20 GEV，少于Higgs Boson的质量，它们提供了迄今为止的最佳限制，即Higgs Boson的分支机构的最佳限制，用于$Cτ$（Z $ _ \ Mathrm {d d} $）（VARIM）（Z $ _ \ MATHRM）（VARY）（VARY） $ m_ \ mathrm {z_d} $）在0.03和$ {\ oft} $ 0.5毫米之间，高于$ {\ oft} $ 0.5 m。我们的结果还对长寿颗粒产生的最佳约束，其质量大于10 GEV的质量大于Higgs Boson的腐烂效果，并腐烂到一对Muons。
An inclusive search for long-lived exotic particles decaying to a pair of muons is presented. The search uses data collected by the CMS experiment at the CERN LHC in proton-proton collisions at $\sqrt{s}$ = 13 TeV in 2016 and 2018 and corresponding to an integrated luminosity of 97.6 fb$^{-1}$. The experimental signature is a pair of oppositely charged muons originating from a common secondary vertex spatially separated from the pp interaction point by distances ranging from several hundred $μ$m to several meters. The results are interpreted in the frameworks of the hidden Abelian Higgs model, in which the Higgs boson decays to a pair of long-lived dark photons Z$_\mathrm{D}$, and of a simplified model, in which long-lived particles are produced in decays of an exotic heavy neutral scalar boson. For the hidden Abelian Higgs model with $m_\mathrm{Z_D}$ greater than 20 GeV and less than half the mass of the Higgs boson, they provide the best limits to date on the branching fraction of the Higgs boson to dark photons for $cτ$(Z$_\mathrm{D}$) (varying with $m_\mathrm{Z_D}$) between 0.03 and ${\approx}$ 0.5 mm, and above ${\approx}$ 0.5 m. Our results also yield the best constraints on long-lived particles with masses larger than 10 GeV produced in decays of an exotic scalar boson heavier than the Higgs boson and decaying to a pair of muons.
