Yerevan Physics Institute, Yerevan, Armenia.
Institut für Hochenergiephysik, Wien, Austria.
Phys Rev Lett. 2019 Sep 27;123(13):131802. doi: 10.1103/PhysRevLett.123.131802.
A search for a light charged Higgs boson (H^{+}) decaying to a W boson and a CP-odd Higgs boson (A) in final states with eμμ or μμμ is performed using data from pp collisions at sqrt[s]=13 TeV, recorded by the CMS detector at the LHC and corresponding to an integrated luminosity of 35.9 fb^{-1}. In this search, it is assumed that the H^{+} boson is produced in decays of top quarks, and the A boson decays to two oppositely charged muons. The presence of signals for H^{+} boson masses between 100 and 160 GeV and A boson masses between 15 and 75 GeV is investigated. No evidence for the production of the H^{+} boson is found. Upper limits at 95% confidence level are obtained on the combined branching fraction for the decay chain, t→bH^{+}→bW^{+}A→bW^{+}μ^{+}μ^{-}, of 1.9×10^{-6} to 8.6×10^{-6}, depending on the masses of the H^{+} and A bosons. These are the first limits for these decay modes of the H^{+} and A bosons.
使用 CMS 探测器在 LHC 上记录的质心能量为 13 TeV 的 pp 对撞数据，对希格斯玻色子轻子味衰变（H^{+}→W^{+}A）过程进行了搜索，该过程的末态包含 eμμ 或 μμμ。在这个搜索中，假设 H^{+}玻色子是由 top 夸克衰变产生的，A 玻色子衰变为两个相反电荷的 muon。研究了 100GeV<m(H^{+})<160GeV 和 15GeV<m(A)<75GeV 范围内 H^{+}和 A 玻色子的信号存在情况。未发现 H^{+}玻色子产生的证据。在 H^{+}和 A 玻色子质量范围内，得到了该衰变链（t→bH^{+}→bW^{+}A→bW^{+}μ^{+}μ^{-}）的联合分支比的 95%置信水平上界为 1.9×10^{-6}至 8.6×10^{-6}，具体取决于 H^{+}和 A 玻色子的质量。这是 H^{+}和 A 玻色子这些衰变模式的首次限制。
