Aaboud, M;
Aad, G;
Abbott, B;
Abdinov, O;
Abeloos, B;
Abhayasinghe, DK;
Abidi, SH;
... Zwalinski, L; + view all
(2019)
Cross-section measurements of the Higgs boson decaying into a pair of tau-leptons in proton-proton collisions at root s=13 TeV with the ATLAS detector.
Physical Review D
, 99
(7)
, Article 072001. 10.1103/PhysRevD.99.072001.
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Abstract
A measurement of production cross sections of the Higgs boson in proton-proton collisions is presented in the H → ττ decay channel. The analysis is performed using 36.1 fb−1 of data recorded by the ATLAS experiment at the Large Hadron Collider at a center-of-mass energy of ffiffi s p ¼ 13 TeV. All combinations of leptonic (τ → lvv¯ with l ¼ e; μ) and hadronic (τ → hadrons v) τ decays are considered. The H → ττ signal over the expected background from other Standard Model processes is established with an observed (expected) significance of 4.4 (4.1) standard deviations. Combined with results obtained using data taken at 7 and 8 TeV center-of-mass energies, the observed (expected) significance amounts to 6.4 (5.4) standard deviations and constitutes an observation of H → ττ decays. Using the data taken at ffiffi s p ¼ 13 TeV, the total cross section in the H → ττ decay channel is measured to be 3.77þ0.60 −0.59 ðstatÞ þ0.87 −0.74 ðsystÞ pb, for a Higgs boson of mass 125 GeV assuming the relative contributions of its production modes as predicted by the Standard Model. Total cross sections in the H → ττ decay channel are determined separately for vector-boson-fusion production and gluon-gluon-fusion production to be σVBF H→ττ ¼ 0.28 0.09 ðstatÞ þ0.11 −0.09 ðsystÞ pb and σggF H→ττ ¼ 3.1 1.0 ðstatÞ þ1.6 −1.3 ðsystÞ pb, respectively. Similarly, results of a fit are reported in the framework of simplified template cross sections. All measurements are in agreement with Standard Model expectations.
| Type: | Article |
|---|---|
| Title: | Cross-section measurements of the Higgs boson decaying into a pair of tau-leptons in proton-proton collisions at root s=13 TeV with the ATLAS detector |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevD.99.072001 |
| Publisher version: | https://doi.org/10.1103/PhysRevD.99.072001 |
| Language: | English |
| Additional information: | This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10073315 |
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