Measuring 𝒕𝒕𝑯 production using two light leptons and a hadronic 𝝉 with ATLAS

The report describes the measurement of 𝑡𝑡𝐻 production, where the final states should be two light leptons and a hadronic 𝜏 with the ATLAS experiment. The analysis uses Monte Carlo simulation to optimize the event selection with an integrated luminosity 140 fb)*. The best cut is cutting the number of b jets no less than 2 after requiring the jets number more than 4, then the significance reaches to 0.53. The signal could be separated into two parts (Higgs boson decays to 𝜏∗𝜏 and Higgs boson decays to 𝑊∗𝑊) and in the region of leading 𝜏 transverse momentum > 50 GeV and sub-leading lepton transverse momentum < 50GeV, the yields of 𝑡𝑡𝐻_𝑊𝑊 is around 2 times the integral of the 𝑡𝑡𝐻_𝜏𝜏. For the new lepton + tau trigger, the yields of the signal and backgrounds increase, especially the 𝑡𝑡. But the signal over background ratio reduces to 0.02, which is much less than the dilepton trigger.