Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Search for a massive Di-photon resonance at ∝s = 91 – 172 GeV
AU - Kartvelishvili, Vakhtang
AU - OPAL Collaboration
PY - 1998/3
Y1 - 1998/3
N2 - 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 ∝s ≈ Mz to place limits onB(H0 → γγ 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 onB(H0 →4 γγ x σ(e+e− → H°Z°) of 290 – 830 fb are obtained over 40 <MH < 160 GeV. Higgs scalars which couple only to gauge bosons with Standard Model strength are ruled out up to a mass of 76.5 GeV at the 95% confidence level.
AB - 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 ∝s ≈ Mz to place limits onB(H0 → γγ 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 onB(H0 →4 γγ x σ(e+e− → H°Z°) of 290 – 830 fb are obtained over 40 <MH < 160 GeV. Higgs scalars which couple only to gauge bosons with Standard Model strength are ruled out up to a mass of 76.5 GeV at the 95% confidence level.
U2 - 10.1007/BF01245796
DO - 10.1007/BF01245796
M3 - Journal article
VL - 1
SP - 31
EP - 43
JO - European Physical Journal C: Particles and Fields
JF - European Physical Journal C: Particles and Fields
SN - 1434-6044
IS - 1
ER -