Speaker
Description
The talk with present the cross section measurements of the Higgs bosons decaying to a pair of hadronically decaying tau leptons in the high Lorentz-boosted regime. The analysis is based on the full Run 2 dataset of proton-proton collisions at a center-of-mass energy of √s=13 TeV and a partial Run 3 dataset at √s=13.6 TeV collected in the 2022-2024 period by the ATLAS experiment. The analysis extends the sensitivity of previous measurements to Higgs boson transverse momentum above 300 GeV by reconstructing tau lepton pairs produced with a small separation in large radius jets. The standard tau reconstruction has limited efficiency in this phase space, requiring dedicated boosted di-tau reconstruction and identification techniques, combined with multivariate analysis methods, to extract the signal. For Higgs boson transverse momentum above 300 GeV, results are reported for an inclusive and differential measurements and within the Simplified Template Cross-Section framework. For the inclusive measurement, the analysis yields an observed (expected) significance of 3.8 (3.3) sigma over the background-only hypothesis, hence providing signal evidence in the probed analysis phase space.
| 请选择分会 | TeV物理和超出标准模型新物理 |
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