Search for exclusive Higgs and Z boson decays to ϕγ and ργ with the ATLAS detector
Search for exclusive Higgs and Z boson decays to ϕγ and ργ with the ATLAS detector
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DOI：
10.1007/jhep07(2018)127
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发表时间：
2017-12
影响因子：
5.4
通讯作者：
M. Aaboud;G. Aad;B. Abbott;O. Abdinov;Baptiste Abeloos;S. H. Abidi;O. AbouZeid;N. Abraham;
中科院分区：
文献类型：
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作者：
M. Aaboud;G. Aad;B. Abbott;O. Abdinov;Baptiste Abeloos;S. H. Abidi;O. AbouZeid;N. Abraham;
我们用欧洲核子研究中心大型强子对撞机的ATLAS探测器在13 TeV收集的pp碰撞数据样本进行了希格斯玻色子和Z玻色子唯一衰变为π介子或ρ介子和光子的研究，该样本对应于高达35.6 fb − 1的积分光度。𝑠这些衰变被认为是希格斯玻色子与轻夸克耦合的探测器。正如标准模型所预期的那样，没有观察到显著超出背景的事件。在95%的置信水平下，希格斯玻色子衰变到π γ和ρ γ的分支分数的上限分别为4.8 × 10 − 4和8.8 × 10 − 4。对应的Z玻色子衰变的95%置信度上限分别为0.9 × 10 − 6和25 × 10 − 6。
A search for the exclusive decays of the Higgs and Z bosons to a ϕ or ρ meson and a photon is performed with a pp collision data sample corresponding to an integrated luminosity of up to 35.6 fb−1 collected at 𝑠√=13 TeV with the ATLAS detector at the CERN Large Hadron Collider. These decays have been suggested as a probe of the Higgs boson couplings to light quarks. No significant excess of events is observed above the background, as expected from the Standard Model. Upper limits at 95% confidence level were obtained on the branching fractions of the Higgs boson decays to ϕγ and ργ of 4.8 × 10−4 and 8.8 × 10−4, respectively. The corresponding 95% confidence level upper limits for the Z boson decays are 0.9 × 10−6 and 25 × 10−6 for ϕγ and ργ, respectively.