Search for gamma gamma decays of a Higgs boson produced in association with a fermion pair in e+ e- collisions at LEP

Collaboration
Jul, 2000
16 pages
Published in:
  • Phys.Lett.B 487 (2000) 241-252
e-Print:
Report number:
  • CERN-EP-2000-083
Experiments:

Citations per year

200020032006200920120123456
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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