PoS - Proceedings of Science
Volume 367 - XXIX International Symposium on Lepton Photon Interactions at High Energies (LeptonPhoton2019) - Posters
Measurements of the Higgs production cross section in the $H \rightarrow \tau \tau$ decay channel with the ATLAS experiment
A. Murrone*  on behalf of the ATLAS Collaboration
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Pre-published on: November 04, 2019
Published on: December 17, 2019
Measurements of the Higgs production cross section in the $H \rightarrow \tau \tau$ decay channel are presented. The results are obtained using $36.1$ fb$^{-1}$ of data collected by the ATLAS experiment at $\sqrt{s}=13$ TeV. The observed (expected) significance of the $H \rightarrow \tau \tau$ signal excess over the expected background amounts to 4.4 (4.1) standard deviations. This result, combined with the data taken at $\sqrt{s}=7$ and 8 TeV, leads to an observed (expected) significance of 6.4 (5.4) and constitutes the first ATLAS observation of $H \rightarrow \tau \tau$. The measured total cross section of $H \rightarrow \tau \tau$, using the data collected at $\sqrt{s}=13$ TeV, is $3.77^{+0.60}_{-0.59}~\text{(stat.)}~^{+0.87}_{-0.74}~\text{(syst.)}$ pb, assuming the relative contributions of the Higgs production processes as predicted by the Standard Model. In addition, measurements of the vector boson fusion and gluon-gluon fusion have been performed separately and similar results are reported based on the simplified template cross section framework. All the measurements are in agreement with the Standard Model predictions.
DOI: https://doi.org/10.22323/1.367.0167
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