Abstract

A combined search for the Standard Model Higgs boson with the ATLAS experiment at the LHC using datasets corresponding to integrated luminosities from 1.04 fb-1 to 4.9 fb-1 of pp collisions collected at sqrt(s) = 7 TeV is presented. The Higgs boson mass ranges 112.9-115.5 GeV, 131-238 GeV and 251-466 GeV are excluded at the 95% confidence level (CL), while the range 124-519 GeV is expected to be excluded in the absence of a signal. An excess of events is observed around mH ~ 126 GeV with a local significance of 3.5 standard deviations (sigma). The local significances of H -> gamma gamma, H -> Z Z(*) -> l+l-l'+l'- and H -> W W(*) -> l+nul'-nubar, the three most sensitive channels in this mass range, are 2.8sigma, 2.1sigma and 1.4sigma, respectively. The global probability for the background to produce such a fluctuation anywhere in the explored Higgs boson mass range 110-600 GeV is estimated to be ~ 1.4% or, equivalently, 2.2sigma.

Autore Pugliese

• Ventura Andrea , Gorini Edoardo , Spagnolo Stefania Antonia

Tutti gli autori

• G. AAD , M. BIANCO , G. CHIODINI , E. GORINI , M. PRIMAVERA , S. SPAGNOLO , A. VENTURA , ET AL.

Titolo volume/Rivista

PHYSICS LETTERS. SECTION B

Anno di pubblicazione

2012

ISSN

0370-2693

ISBN

Non Disponibile

Numero di citazioni Wos

394

Ultimo Aggiornamento Citazioni

28/04/2018

Numero di citazioni Scopus

365

Ultimo Aggiornamento Citazioni

22/04/2018

Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile