Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
1997-09-22
Eur.Phys.J.C1:31-43,1998
Physics
High Energy Physics
High Energy Physics - Experiment
The interpretation of the upper limit for the Higgs -> gamma gamma branching ratio limit assuming the Standard Model productio
Scientific paper
10.1007/s100520050060
A search for the resonant production of high mass photon pairs associated with a leptonic or hadronic system has been performed using a total data sample of 25.7 pb^-1 taken at centre-of-mass energies between 130 GeV and 172 GeV with the OPAL detector at LEP. The observed number of events is consistent with the expected number from Standard Model processes. The observed candidates are combined with search results from sqrt{s} ~ M_Z to place limits on Br(H^0 -> gamma gamma) within the Standard Model for Higgs boson masses up to 77 GeV, and on the production cross section of any scalar resonance decaying into di-photons. Upper limits on Br(H^0 -> gamma gamma) x sigma(e^+e^- -> H^0 Z^0) of 290 - 830 fb are obtained over 40 < M_H < 160 GeV. Type-I two-Higgs-doublet scalars which couple only to gauge bosons are ruled out up to a mass of 76.5 GeV at the 95% confidence level.
et al Ackerstaff K.
The OPAL Collaboration
No associations
LandOfFree
Search for a Massive Di-photon Resonance at sqrt{s} = 91-172 GeV does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Search for a Massive Di-photon Resonance at sqrt{s} = 91-172 GeV, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Search for a Massive Di-photon Resonance at sqrt{s} = 91-172 GeV will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-503961