Cross-section measurements of the Higgs boson decaying into a pair of τ-leptons in proton-proton collisions at √s=13 TeV with the ATLAS detector

0520713 - FZÚ 2020 RIV US eng J - Journal Article
Aaboud, M. - Aad, G. - Abbott, B. - Chudoba, Jiří - Hejbal, Jiří - Hladík, Ondřej - Jačka, Petr - Jakoubek, Tomáš - Kepka, Oldřich - Kroll, Jiří - Kupčo, Alexander - Lokajíček, Miloš - Lysák, Roman - Marčišovský, Michal - Mikeštíková, Marcela - Němeček, Stanislav - Penc, Ondřej - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek … Total 2918 authors
Cross-section measurements of the Higgs boson decaying into a pair of τ-leptons in proton-proton collisions at √s=13 TeV with the ATLAS detector.
Physical Review D. Roč. 99, č. 7 (2019), s. 1-39, č. článku 072001. ISSN 2470-0010. E-ISSN 2470-0029
R&D Projects: GA MŠMT LM2015058
Institutional support: RVO:68378271
Keywords : ATLAS * CERN LHC Coll * background * statistical analysis * data analysis method * experimental results * 13000 GeV-cms
OECD category: Particles and field physics
Impact factor: 4.833, year: 2019
Method of publishing: Open access

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 36.1fb−1 of data recorded by the ATLAS experiment at the Large Hadron Collider at a center-of-mass energy of s√=13 TeV. All combinations of leptonic (τ→lνν¯ with l=e, μ) and hadronic (τ→ hadrons ν) 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 s√=13 TeV, the total cross section in the H→ττ decay channel is measured to be 3.77+0.60−0.59(stat.)+0.87−0.74(syst.)pb.
Permanent Link: http://hdl.handle.net/11104/0305370