Yerevan Physics Institute, Yerevan, Armenia.
Institut für Hochenergiephysik, Wien, Austria.
Phys Rev Lett. 2019 Jan 18;122(2):021801. doi: 10.1103/PhysRevLett.122.021801.
A search for the Higgs boson decaying to two oppositely charged muons is presented using data recorded by the CMS experiment at the CERN LHC in 2016 at a center-of-mass energy sqrt[s]=13 TeV, corresponding to an integrated luminosity of 35.9 fb^{-1}. Data are found to be compatible with the predicted background. For a Higgs boson with a mass of 125.09 GeV, the 95% confidence level observed (background-only expected) upper limit on the production cross section times the branching fraction to a pair of muons is found to be 3.0 (2.5) times the standard model expectation. In combination with data recorded at center-of-mass energies sqrt[s]=7 and 8 TeV, the background-only expected upper limit improves to 2.2 times the standard model value with a standard model expected significance of 1.0 standard deviation. The corresponding observed upper limit is 2.9 with an observed significance of 0.9 standard deviation. This corresponds to an observed upper limit on the standard model Higgs boson branching fraction to muons of 6.4×10^{-4} and to an observed signal strength of 1.0±1.0(stat)±0.1(syst).
使用 CMS 实验在 CERN LHC 于 2016 年在质心能量 sqrt[s]=13 TeV 下记录的数据，对希格斯玻色子衰变为两个带相反电荷的μ子进行了搜索，相应的积分亮度为 35.9 fb^{-1}。数据与预测的背景相符。对于质量为 125.09 GeV 的希格斯玻色子，在 95%置信水平下（仅背景预期），对产生截面乘以到一对μ子的分支比的观测上限被发现是标准模型预期的 3.0（2.5）倍。与在质心能量 sqrt[s]=7 和 8 TeV 下记录的数据结合，在仅背景预期的情况下，上限提高到标准模型值的 2.2 倍，标准模型预期的显著度为 1.0 个标准差。相应的观测上限为 2.9，观测显著度为 0.9 个标准差。这对应于标准模型希格斯玻色子到μ子的分支比的观测上限为 6.4×10^{-4}，以及观测到的信号强度为 1.0±1.0(stat)±0.1(syst)。
