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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

Physical review. D, 2019-04, Vol.99 (7), p.1 [Periódico revisado por pares]

College Park: American Physical Society

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  • Título:
    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
  • Autor: Aaboud, M
  • Assuntos: ATOMIC AND MOLECULAR PHYSICS ; Center of mass ; Cross-sections ; Decay ; Fysik ; Hadrons ; Higgs bosons ; Large Hadron Collider ; Leptons ; Natural Sciences ; Naturvetenskap ; PARTICLE ACCELERATORS ; Particle collisions ; particle properties ; Physical Sciences ; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS ; Protons ; Quarks ; Signal processing ; spontaneous symmetry breaking ; Subatomic Physics ; Subatomär fysik ; tau leptons
  • É parte de: Physical review. D, 2019-04, Vol.99 (7), p.1
  • Notas: NFR/255182
    USDOE Office of Science (SC), High Energy Physics (HEP)
    SC0017996; AC02-76SF00515; AC02-05CH11231; SC0007881
  • Descrição: 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 s=13 TeV. All combinations of leptonic (τ→ℓvv¯ with ℓ=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 s=13 TeV, the total cross section in the H→ττ decay channel is measured to be 3.77−0.59+0.60 (stat) −0.74+0.87 (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 σH→ττVBF=0.28±0.09 (stat) −0.09+0.11 (syst) pb and σH→ττggF=3.1±1.0 (stat) −1.3+1.6 (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.
  • Editor: College Park: American Physical Society
  • Idioma: Inglês;Norueguês
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