Abstract
Motivated by recent anomalous CDF data on $Wjj$ events, we study a possible explanation within the framework of the two-Higgs doublet model. We find that a charged Higgs boson of mass $\sim$ 140 GeV with appropriate couplings can account for the observed excess. In addition, we consider the flavor-changing neutral current effects induced at loop level by the charged Higgs boson on the $B$ meson system to further constrain the model. Our study shows that the like-sign charge asymmetry $A_{s\ell}^b$ can be of ${\cal O}(10^{-3})$ in this scenario.
Highlights
The CDF Collaboration reported data indicating an excess of W jj events where W decayed leptonically [1]
Motivated by recent anomalous CDF data on W jj events, we study a possible explanation within the framework of the two-Higgs doublet model
We find that a charged Higgs boson of mass ∼ 140 GeV with appropriate couplings can account for the observed excess
Summary
If Y F and Y F cannot be diagonalized simultaneously, flavor-changing neutral currents (FCNC’s) will be induced at tree level and associated with the doublet H. If we impose some symmetry to suppress the tree-level FCNC’s, as in type-II THDM, the couplings of the new Higgs bosons are always proportional to the quark masses. In this case, the excess W jj events should be mostly b-flavored, which is against the observation. The excess W jj events should be mostly b-flavored, which is against the observation To avoid this problem, instead of imposing symmetry, we find that Y F and Y F can be simultaneously diagonalized if they are related by some transformation.
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