Combined search for the Standard Model Higgs boson using up to 4.9 fb(-1) of pp collision data at root s=7 TeV with the ATLAS detector at the LHC
Journal Article
·
· Physics Letters B
OSTI ID:1046430
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{sup -1} to 4.9 fb{sup -1} of pp collisions collected at {radical}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 m{sub H} {approx} 126 GeV with a local significance of 3.5 standard deviations ({sigma}). The local significances of H {yields} {gamma}{gamma}, H {yields} ZZ{sup (*)} {yields} {ell}{sup +}{ell}{sup -}{ell}{prime}{sup +}{ell}{prime}{sup -} and H {yields} WW{sup (*)} {yields} {ell}{sup +}{nu}{ell}{prime}{sup -}{bar {nu}}, 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 {approx}1.4% or, equivalently, 2.2{sigma}.
- Research Organization:
- BROOKHAVEN NATIONAL LABORATORY (BNL)
- Sponsoring Organization:
- USDOE SC OFFICE OF SCIENCE (SC)
- DOE Contract Number:
- AC02-98CH10886
- OSTI ID:
- 1046430
- Report Number(s):
- BNL--98252-2012-JA; KA1101021
- Journal Information:
- Physics Letters B, Journal Name: Physics Letters B Journal Issue: 1 Vol. 710
- Country of Publication:
- United States
- Language:
- English
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