arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1909.02845hep-ex
收藏

用ATLAS实验收集的$\sqrt{s}=$ 13 TeV质子-质子碰撞数据的$80$ fb PDMATHAAB对希格斯玻色子产生和衰变的综合测量

Combined measurements of Higgs boson production and decay using up to $80$ fb$^{-1}$ of proton-proton collision data at $\sqrt{s}=$ 13 TeV collected with the ATLAS experiment

ATLAS Collaboration

摘要:

给出了希格斯玻色子产生截面和分支分数的联合测量结果。该组合基于对希格斯玻色子衰变模式$H \to γγ$、$ZZ^\ast$、$WW^\ast$、$ττ$、$b\bar{b}$、$μμ$的分析,寻找衰变到不可见的最终状态,以及对离壳希格斯玻色子产生的测量。使用ATLAS探测器在$\sqrt{s}=$ 13 TeV收集的质子-质子碰撞数据的$79.8$ fb $^{-1}$。结果给出了胶子-胶子融合和矢量-玻色子融合过程,以及与矢量玻色子或顶夸克相关的生产。全局信号强度被确定为$μ= 1.11^{+0.09}_{-0.08}$。结合测量产生的$6.5σ$($5.3σ$)的矢量玻色子融合生产过程的观察(预期)的意义。还示出了在简化的模板横截面框架内定义的运动学区域中的测量。结果解释的修改器适用于标准模型的耦合的希格斯玻色子的其他粒子,并用于设置排除限制的参数在两个希格斯偶极子模型和简化的最小超对称标准模型。没有观察到与标准模型预测的显著偏差。

英文摘要:

Combined measurements of Higgs boson production cross sections and branching fractions are presented. The combination is based on the analyses of the Higgs boson decay modes $H \to γγ$, $ZZ^\ast$, $WW^\ast$, $ττ$, $b\bar{b}$, $μμ$, searches for decays into invisible final states, and on measurements of off-shell Higgs boson production. Up to $79.8$ fb$^{-1}$ of proton-proton collision data collected at $\sqrt{s}=$ 13 TeV with the ATLAS detector are used. Results are presented for the gluon-gluon fusion and vector-boson fusion processes, and for associated production with vector bosons or top-quarks. The global signal strength is determined to be $μ= 1.11^{+0.09}_{-0.08}$. The combined measurement yields an observed (expected) significance for the vector-boson fusion production process of $6.5σ$ ($5.3σ$). Measurements in kinematic regions defined within the simplified template cross section framework are also shown. The results are interpreted in terms of modifiers applied to the Standard Model couplings of the Higgs boson to other particles, and are used to set exclusion limits on parameters in two-Higgs-doublet models and in the simplified Minimal Supersymmetric Standard Model. No significant deviations from Standard Model predictions are observed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑