论文标题
搜索独家higgs和$ z $玻色子腐烂到矢量夸克状态和使用$ 139 $ fb $^{ - 1} $ Atlas $ \ sqrt {s} = 13 $ tev Proton $ -
Searches for exclusive Higgs and $Z$ boson decays into a vector quarkonium state and a photon using $139$ fb$^{-1}$ of ATLAS $\sqrt{s}=13$ TeV proton$-$proton collision data
论文作者
论文摘要
在$μ^+μ^ - γ$最终状态中，搜索Higgs和$ Z $ BOSON进入矢量Quarkonium状态和光子的搜索是在$μ^+μ^ - γ$最终状态中进行的，该状态具有质子$ - $ proton碰撞数据样本，对应于$ 139 $ fb $ fb $^{ - 1} $ calterty的集成亮度，以$^{ - 1} $ \ s n cyvert} CERN大型强子对撞机。观察到的数据与预期的背景兼容。 Higgs Boson分支分数的95％置信度上限衰减成$ j/ψγ$，$ψ（2s）γ$和$υ（1s，2s，2s，3s）γ$的95％的升级分数为$ 2.0 \ times10^{-4} $，$ 10.5} $，$ 10.5 \ \ $ 10.5 \ \ $ 10.5 $（2.5,4.2,3.4）\ times10^{ - 4} $，假设Higgs Boson的标准模型生产。 $ z $玻色子衰减的分支分数上的相应95％CL上限为$ 1.2 \ times10^{ - 6} $，$ 2.4 \ times10^{ - 6} $，$（1.1,1.3,2.4）\ times10^{ - 6} $。观察到的95％Cl间隔为$（-133,175）$，以$κ_c/κ_γ$比率的$κ_c/κ_γ$比率为boson耦合修饰符，而95％的Cl间隔为$（-37,40）$，以$κ_B/κ____γ$获得。
Searches for the exclusive decays of Higgs and $Z$ bosons into a vector quarkonium state and a photon are performed in the $μ^+μ^- γ$ final state with a proton$-$proton collision data sample corresponding to an integrated luminosity of $139$ fb$^{-1}$ collected at $\sqrt{s}=13$ TeV with the ATLAS detector at the CERN Large Hadron Collider. The observed data are compatible with the expected backgrounds. The 95% confidence-level upper limits on the branching fractions of the Higgs boson decays into $J/ψγ$, $ψ(2S) γ$, and $Υ(1S,2S,3S) γ$ are found to be $2.0\times10^{-4}$, $10.5\times10^{-4}$, and $(2.5,4.2,3.4)\times10^{-4}$, respectively, assuming Standard Model production of the Higgs boson. The corresponding 95% CL upper limits on the branching fractions of the $Z$ boson decays are $1.2\times10^{-6}$, $2.4\times10^{-6}$, and $(1.1,1.3,2.4)\times10^{-6}$. An observed 95% CL interval of $(-133,175)$ is obtained for the $κ_c/κ_γ$ ratio of Higgs boson coupling modifiers, and a 95% CL interval of $(-37,40)$ is obtained for $κ_b/κ_γ$.
