Thursday, February 9, 2012

1202.1796 (Emidio Gabrielli et al.)

Has a fermiophobic Higgs boson been detected at the LHC ?    [PDF]

Emidio Gabrielli, Barbara Mele, Martti Raidal
We show that, in the present searches for the Higgs boson at the LHC, a
fermiophobic Higgs mimics the standard-model-like Higgs if its mass is around
125 GeV. For that mass the order-of-magnitude reduction of fermiophobic Higgs
production cross sections is compensated by a corresponding increase in the
Higgs branching fraction into \gamma\gamma, while the WW*, ZZ*, Z\gamma,
signals are predicted to be somewhat smaller. The excess seen in the CMS
exclusive vector-boson-fusion analysis suggests that the LHC sees a
fermiophobic instead of a standard-model-like Higgs boson. Due to the different
kinematics, a dedicated LHC analysis should be able to discriminate between the
two scenarios. If the Higgs boson turns out to be fermiophobic, many of our
present ideas of new physics should be revised.
View original: http://arxiv.org/abs/1202.1796

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