INVESTIGADORES
MONTICELLI Fernando Gabriel
artículos
Título:
Search for the Standard Model Higgs boson in the decay channel H->ZZ(*)->4l with 4.8 fb-1 of pp collisions at √s =7 TeV with ATLAS
Autor/es:
ATLAS COLLABORATION, G. AAD, F. MONTICELLI, ET AL
Revista:
PHYSICS LETTERS B
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2012 vol. 710 p. 383 - 402
ISSN:
0370-2693
Resumen:
This Letter presents a search for the Standard Model Higgs boson in the decay channel H→ZZ(⁎)→ℓ+ℓ−ℓ′+ℓ′−, where ℓ,ℓ′=eℓ,ℓ′=e or μ, using proton–proton collisions at s=7 TeV recorded with the ATLAS detector and corresponding to an integrated luminosity of 4.8 fb−1. The four-lepton invariant mass distribution is compared with Standard Model background expectations to derive upper limits on the cross section of a Standard Model Higgs boson with a mass between 110 GeV and 600 GeV. The mass ranges 134–156 GeV, 182–233 GeV, 256–265 GeV and 268–415 GeV are excluded at the 95% confidence level. The largest upward deviations from the background-only hypothesis are observed for Higgs boson masses of 125 GeV, 244 GeV and 500 GeV with local significances of 2.1, 2.2 and 2.1 standard deviations, respectively. Once the look-elsewhere effect is considered, none of these excesses are significant.