Search for gamma gamma decays of a Higgs boson produced in association with a fermion pair in e+ e- collisions at LEP
Collaboration
16 pages
Published in:
- Phys.Lett.B 487 (2000) 241-252
e-Print:
- hep-ex/0008004 [hep-ex]
Report number:
- CERN-EP-2000-083
Experiments:
View in:
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Abstract: (Elsevier)
A search for γγ decays of a Higgs boson is performed in the data sample collected at LEP with the ALEPH detector between 1991 and 1999. This corresponds to an integrated luminosity of 672 pb −1 at centre-of-mass energies ranging from 88 to 202 GeV. The search is based on topologies arising from a Higgs boson produced in association with a fermion pair via the Higgs-strahlung process e + e − →Hf f ̄ , with f f ̄ =ν ν ̄ , e + e − ,μ + μ − ,τ + τ − or q q ̄ . Twenty-two events are selected in the data, while 28 events are expected from standard model processes. An upper limit is derived, as a function of the Higgs boson mass, on the product of the e + e − →Hf f ̄ cross section and the H→γγ branching fraction. In particular, a fermiophobic Higgs boson produced with the standard model cross section is excluded at 95% confidence level for all masses below 100.7 GeV /c 2 .Note:
- 11 pages, 3 figures, ICHEP 2000
- electron positron: colliding beams
- electron positron: annihilation
- Higgs particle: search for
- Higgs particle: electroproduction
- Z0: associated production
- fermion: pair production
- Higgs particle: radiative decay
- channel cross section: branching ratio
- mass dependence
- Higgs particle: mass
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Figures(4)
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