Combined search for the Standard Model Higgs boson using up to 4.9 fb-1 of pp collision data at sqrt(s) = 7 TeV with the ATLAS detector at the LHC

Collaboration, ATLAS, Alam, Muhammad, Berry, Tracey, Boisvert, Veronique, Cowan, Glen, Edwards, Clive, George, Simon, Goncalo, Ricardo, Hayden, Daniel, Misiejuk, Andrzej, Pastore, Francesca, Rose, Matthew, Spano, Francesco, Strong, J.A. and Teixeira-Dias, Pedro

(2012)

Collaboration, ATLAS, Alam, Muhammad, Berry, Tracey, Boisvert, Veronique, Cowan, Glen, Edwards, Clive, George, Simon, Goncalo, Ricardo, Hayden, Daniel, Misiejuk, Andrzej, Pastore, Francesca, Rose, Matthew, Spano, Francesco, Strong, J.A. and Teixeira-Dias, Pedro (2012) Combined search for the Standard Model Higgs boson using up to 4.9 fb-1 of pp collision data at sqrt(s) = 7 TeV with the ATLAS detector at the LHC. Physics Letters B, 710 (1).

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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 significance of H -> gamma gamma, H -> ZZ(*) -> lll'l' and H -> WW(*) -> lvl'v, the three most sensitive channels in this mass range, are 2.8 sigma, 2.1 sigma and 1.4 sigma, 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 2.2 sigma.

Information about this Version

This is a Submitted version
This version's date is: 29/3/2012
This item is not peer reviewed

Link to this Version

https://repository.royalholloway.ac.uk/items/034ef366-5be4-d81f-2ece-c2d8fd6e6914/4/

Deposited by Research Information System (atira) on 19-Jun-2013 in Royal Holloway Research Online.Last modified on 19-Jun-2013

Notes

8 pages plus author list (22 pages total), 4 figures, author list corrected, matches published version in PLB


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