论文标题
使用$ \ sqrt {s} = 13 $ tev，使用$ pp $ collisions从单孔和双higgs生产的Higgs Boson自耦合的约束自耦合。
Constraints on the Higgs boson self-coupling from single- and double-Higgs production with the ATLAS detector using $pp$ collisions at $\sqrt{s}=13$ TeV
论文作者
论文摘要
Higgs玻色子自耦合的约束是通过在$ b \ bar {b} b \ bar {b} $，$ b \ b \ bar {b}τ^+τ+τ^ - $和$ b \ bar {b \ b} $ decay $ decay channels $ decay cannels unalone中与$ b \ bar {b} $ bar {b \ bar {b \ bar {b \ bar {b \ bar {b \ bar {b \ bar {b \ bar {b \ bar {b \ bar {b \ bar {b \ bar {b \ bar {b} $ degay $分析$ $ zz^*$，$ ww^*$，$τ^+τ^ - $和$ b \ bar {b} $衰减通道。这些分析中使用的数据由Atlas检测器在LHC的Proton $ - $ proton碰撞$ \ sqrt {s} = 13 $ TEV记录，并对应于126 $ -139 $ -139 fb $^{ - 1} $的集成光度。双HIGGS分析的组合设定的上限为$μ_{HH} <2.4 $，在双HIGGS生产横截面上的95％置信度下于95％的置信度，并将其标准化为其标准模型预测。结合单基因和双HIGGS分析，并假设新物理学仅影响higgs玻色子自耦合（$λ_{hhh} $），在间隔$ -0.4 <κ__λ=（λ_____________________________________________________________3）之外以95％的置信度排除。通过在适合使用的更多耦合修饰符中添加以说明Higgs玻色子与其他标准模型粒子的相互作用，从而提供了更少的假设，从而提供了更少的假设。在这种放松的情况下，约束将变成$ -1.4 <κ_λ<6.1 $ 95％Cl。
Constraints on the Higgs boson self-coupling are set by combining double-Higgs boson analyses in the $b\bar{b}b\bar{b}$, $b\bar{b}τ^+τ^-$ and $b\bar{b} γγ$ decay channels with single-Higgs boson analyses targeting the $γγ$, $ZZ^*$, $WW^*$, $τ^+ τ^-$ and $b\bar{b}$ decay channels. The data used in these analyses were recorded by the ATLAS detector at the LHC in proton$-$proton collisions at $\sqrt{s}=13$ TeV and correspond to an integrated luminosity of 126$-$139 fb$^{-1}$. The combination of the double-Higgs analyses sets an upper limit of $μ_{HH} < 2.4$ at 95% confidence level on the double-Higgs production cross-section normalised to its Standard Model prediction. Combining the single-Higgs and double-Higgs analyses, with the assumption that new physics affects only the Higgs boson self-coupling ($λ_{HHH}$), values outside the interval $-0.4< κ_λ=(λ_{HHH}/λ_{HHH}^{\textrm{SM}})< 6.3$ are excluded at 95% confidence level. The combined single-Higgs and double-Higgs analyses provide results with fewer assumptions, by adding in the fit more coupling modifiers introduced to account for the Higgs boson interactions with the other Standard Model particles. In this relaxed scenario, the constraint becomes $-1.4 < κ_λ < 6.1$ at 95% CL.
