Abstract: | A search for a Higgs boson with suppressed couplings to fermions, $h_f$,
assumed to be the neutral, lower-mass partner of the Higgs boson discovered at
the Large Hadron Collider, is reported. Such a Higgs boson could exist in
extensions of the standard model with two Higgs doublets, and could be produced
via $par{p} o H^pm h_f o W^* h_f h_f o 4gamma + X$, where $H^pm$ is
a charged Higgs boson. This analysis uses all events with at least three
photons in the final state from proton-antiproton collisions at a
center-of-mass energy of 1.96~TeV collected by the Collider Detector at
Fermilab, corresponding to an integrated luminosity of 9.2~${
m fb}^{-1}$. No
evidence of a signal is observed in the data. Values of Higgs-boson masses
between 10 and 100 GeV/$c^2$ are excluded at 95\% Bayesian credibility. |