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Artículo

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

Aaboud, M.; Aad, G.; Abbott, B.; Abdinov, O.; Abeloos, B.; Alconada Verzini, María JosefinaIcon ; Alonso, FranciscoIcon ; Arduh, Francisco AnuarIcon ; Dova, Maria TeresaIcon ; Hoya, JoaquínIcon ; Monticelli, Fernando GabrielIcon ; Orellana, Gonzalo EnriqueIcon ; Wahlberg, Hernan PabloIcon ; Bossio Sola, Jonathan DavidIcon ; Marceca, GinoIcon ; Otero y Garzon, Gustavo JavierIcon ; Piegaia, Ricardo NestorIcon ; Sacerdoti, SabrinaIcon ; Zibell. A.; Zieminska, D.; Zimine, N. I.; Zimmermann, C.; Zimmermann, S.; Zinonos, Z.; Zinser, M.; Ziolkowski, M.; Živković, L.; Zobernig, G.; Zoccoli, A.; Nedden, M. zur; Zurzolo, G.; Zwalinski, L.; The ATLAS Collaboration
Fecha de publicación: 11/2018
Editorial: American Physical Society
Revista: Physical Review D: Particles, Fields, Gravitation and Cosmology
ISSN: 1550-7998
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Física de Partículas y Campos

Resumen

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, 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 σVBFH→ττ=0.28±0.09(stat.)+0.11−0.09(syst.)pb and σggFH→ττ=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.
Palabras clave: Atlas , High Energy Physics
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/84282
DOI: http://dx.doi.org/10.1103/PhysRevD.99.072001
URL: https://journals.aps.org/prd/abstract/10.1103/PhysRevD.99.072001
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Articulos(IFLP)
Articulos de INST.DE FISICA LA PLATA
Citación
Aaboud, M.; Aad, G.; Abbott, B.; Abdinov, O.; Abeloos, B.; et al.; 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; American Physical Society; Physical Review D: Particles, Fields, Gravitation and Cosmology; D99; 11-2018; 072001-
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