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 [Elektronisk resurs]
- E-artikel/E-kapitelEngelska2019
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LIBRIS-ID:p0tkgkdqmj2dz3rz
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http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-382859uri
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urn:nbn:se:uu:diva-382859urn
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10.1103/PhysRevD.99.072001doi
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<p>For complete list of authors see http://dx.doi.org/10.1103/PhysRevD.99.072001</p>
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Published
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Vetenskapsrådet
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EU, Europeiska forskningsrådet
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EU, Horisont 2020
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Danmarks Grundforskningsfond
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Norges forskningsråd
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Wallenbergstiftelserna
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Deutsche Forschungsgemeinschaft (DFG)
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gratis
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A measurement of production cross sections of the Higgs boson in proton-proton collisions is presented in the H → τ τ 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 √ s = 13 TeV. All combinations of leptonic ( τ → l v v ‾ with l = e , μ ) and hadronic ( τ → hadrons v ) τ decays arc considered. The H → τ τ 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 → τ τ decays. Using the data taken at √ s = 13 TeV, the total cross section in the H → τ τ decay channel is measured to be 3.77 +0.60 -0.59 (stat) +0.87 -0.74 (syst) 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 → τ τ decay channel are determined separately for vector-boson-fusion production and gluon-gluon-fusion production to be σ VBF H → τ τ = 0.28 ± 0.09 (stat) +0.11 -0.09 (syst) pb and σ ggF H → τ τ = 3.1 ± 1.0 (stat) +1.6 -1.3 (syst) 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.
Ämnesord och genrebeteckningar
Biuppslag (personer, institutioner, konferenser, titlar ...)
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Asimakopoulou, Eleni M.
(författare)
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Bergeås Kuutmann, Elin,1980-
(författare)
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Bokan, Petar
(författare)
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Brenner, Richard
(författare)
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Ekelöf, Tord
(författare)
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Ellert, Mattias
(författare)
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Ferrari, Arnaud,1973-
(författare)
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Gradin, P. O. Joakim
(författare)
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Isacson, Max F.
(författare)
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Mårtensson, Mikael U. F.
(författare)
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Sales De Bruin, Pedro
(författare)
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Zwalinski, L.
(författare)
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Uppsala universitetTeknisk-naturvetenskapliga vetenskapsområdet
(utgivare)
Sammanhörande titlar
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Del av/supplement till:channel record
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Ingår i:VärdpublikationPhysical Review D99:72470-0010
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