Search for the standard model Higgs boson decaying into two photons in pp collisions at sqrt(s)=7 TeV

Journal Article · Sun Apr 01 04:00:00 EDT 2012 · Physical Letters B

DOI:https://doi.org/10.1016/j.physletb.2012.03.003· OSTI ID:1176958

Chatrchyan, S. ^[1]; et al.,

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1. Yerevan Physical Institute (Armenia)

A search for a Higgs boson decaying into two photons is described. The analysis is performed using a dataset recorded by the CMS experiment at the LHC from pp collisions at a centre-of-mass energy of 7 TeV, which corresponds to an integrated luminosity of 4.8 inverse femtobarns. Limits are set on the cross section of the standard model Higgs boson decaying to two photons. The expected exclusion limit at 95% confidence level is between 1.4 and 2.4 times the standard model cross section in the mass range between 110 and 150 GeV. The analysis of the data excludes, at 95% confidence level, the standard model Higgs boson decaying into two photons in the mass range 128 to 132 GeV. The largest excess of events above the expected standard model background is observed for a Higgs boson mass hypothesis of 124 GeV with a local significance of 3.1 sigma. The global significance of observing an excess with a local significance greater than 3.1 sigma anywhere in the search range 110-150 GeV is estimated to be 1.8 sigma. More data are required to ascertain the origin of this excess.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
• Contributing Organization: CMS Collaboration
• OSTI ID: 1176958
• Report Number(s): FERMILAB-PUB-12-675; CMS-HIG-11-033; CERN-PH-EP-2012-024; arXiv eprint number arXiv:1202.1487
• Journal Information: Physical Letters B, Journal Name: Physical Letters B Journal Issue: 3 Vol. 710; ISSN 0370-2693
• Country of Publication: United States
• Language: English

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