  Considering the recent experimental results on exclusive semileptonic $B$
meson decays showing sizable departure from their Standard Model prediction of
lepton flavor universality and keeping ongoing and proposed non-standard Higgs
searches in mind, we explore the charged current flavor observables
($\mathcal{R}_{D^{(*)}}$, $\mathcal{R}_{J/\psi}$), among other $b\to c\ell \nu$
transitions, in the presence of a relevant scalar current effective new physics
operator. We use $B_c$ lifetime and predicted bounds on the branching fraction
of $B_c \to \tau \nu$ decay as constraints. We show the allowed parameter space
in terms of the real and imaginary parts of the corresponding Wilson
coefficients for such interactions. Under the light of obtained results, we
study the prospect of two benchmark models, rendering the Wilson coefficients
real (Georgi-Machacek (GM)) and complex (Leptoquark (LQ)) respectively. We show
that constraints from $b\to c\ell \nu$ on GM parameters are consistent with
other flavor constraints on the model, if we drop the \Babar~results. Including
those disfavors the model by more than $3\sigma$. On the other hand, one
benchmark LQ scenario, which gives rise to a single scalar current effective
interaction, is still allowed within $68\%$ confidence level, albeit with a
shrunk parameter space.
