质心系能量√s = 13 TeV的质子-质子碰撞中，利用双光子末态的信号-本底干涉对希格斯玻色子宽度的约束
Constraint on the Higgs boson width in the diphoton final state using signal-background interference in proton-proton collisions at $\sqrt{s}$ = 13 TeV
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中文总结 AI 辅助
该研究利用CMS实验2016-2018年13 TeV质子-质子碰撞的138 fb⁻¹数据，通过信号-本底干涉首次对希格斯玻色子宽度设限，观测上限92 MeV为迄今最严格约束。
中文摘要 AI 辅助
标准模型希格斯玻色子质量为125 GeV，其预言的衰变宽度Γ_H为4.1 MeV。本文首次通过共振H→γγ过程与连续态γγ产生过程之间的干涉，获得了对Γ_H的约束，两者均由胶子-胶子融合产生。该分析使用CMS实验在2016年至2018年间收集的质心系能量√s = 13 TeV的质子-质子碰撞数据，对应积分亮度为138 fb⁻¹。在95%置信水平下，观测到的希格斯玻色子宽度上限为Γ_H < 92 MeV，预期上限为138 MeV。这是迄今为止从壳上希格斯玻色子测量得到的对Γ_H最严格的约束。
英文摘要
The standard model Higgs boson, with a mass of 125 GeV, has a predicted decay width, $Γ_\mathrm{H}$, of 4.1 MeV. This Letter presents the first constraint on $Γ_\mathrm{H}$ obtained through the interference between the resonant H $\to$ $γγ$ process and the continuum $γγ$ production, both produced via gluon-gluon fusion. The analysis is performed using proton-proton collision data at $\sqrt{s}$ = 13 TeV, collected by the CMS experiment between 2016 and 2018, corresponding to an integrated luminosity of 138 fb$^{-1}$. The observed (expected) limit on the Higgs boson width is $Γ_\mathrm{H}$ $\lt$ 92 (138) MeV at 95% confidence level. This is the most stringent constraint on $Γ_\mathrm{H}$ from on-shell Higgs boson measurements to date.
