1202.3072 (Ning Chen et al.)

LHC Signatures of Two-Higgs-Doublets with Fourth Family    [PDF]

Ning Chen, Hong-Jian He

On-going Higgs searches in the light mass window are of vital importance for
testing the Higgs mechanism and probing new physics beyond the standard model
(SM). The latest ATLAS and CMS searches for the SM Higgs boson at the LHC
(7TeV) found some intriguing excesses of events in the \gamma\gamma/VV^*
channels (V=Z,W) around the mass-range of 124-126 GeV. We explore a possible
explanation of the \gamma\gamma and VV^* signals from the light CP-odd Higgs
A^0 or CP-even Higgs h^0 from the general two-Higgs-doublet model with
fourth-family fermions. We demonstrate that by including invisible decays of
the Higgs boson A^0 or h^0 to fourth-family neutrinos, the predicted
\gamma\gamma and VV^* signals can explain the observed new signatures at the
LHC, and will be further probed by the forthcoming LHC runs in 2012.

View original: http://arxiv.org/abs/1202.3072