Search for Nonstandard Higgs Bosons Using High Mass Photon Pairs in pp¯→γγ+2 Jets at √s=1.8 TeV

Le résumé fourni par la source

A search has been carried out for events in the channel $p\overline{p}\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\gamma}+2\mathrm{jets}$. Such a signature can characterize the production of a nonstandard Higgs boson together with a $W$ or $Z$ boson. We refer to this nonstandard Higgs, having standard model couplings to vector bosons but no coupling to fermions, as a ``bosonic Higgs.'' With the requirement of two high transverse energy photons and two jets, the diphoton mass $({m}_{\ensuremath{\gamma}\ensuremath{\gamma}})$ distribution is consistent with expected background. A 90 (95)% confidence level (C.L.) upper limit on the cross section as a function of mass is calculated, ranging from 0.60 (0.80) pb for ${m}_{\ensuremath{\gamma}\ensuremath{\gamma}}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}65\phantom{\rule{0ex}{0ex}}\mathrm{GeV}{/c}^{2}$ to 0.26 (0.34) pb for ${m}_{\ensuremath{\gamma}\ensuremath{\gamma}}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}150\phantom{\rule{0ex}{0ex}}\mathrm{GeV}{/c}^{2}$, corresponding to a $95%$ C.L. lower limit on the mass of a bosonic Higgs of $78.5\mathrm{GeV}{/c}^{2}$.

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