  The ATLAS and CMS experiments have an ambitious search program for charged
Higgs bosons. The two main searches for $H^\pm$ at the LHC have traditionally
been performed in the $\tau \nu$ and $t b$ decay channels, as they provide the
opportunity to probe complementary regions of the Minimal SuperSymmetric Model
(MSSM) parameter space. Charged Higgs bosons may decay also to light quarks,
$H^\pm \to cs/cb$, which represent an additional probe for the mass range below
$m_t$. In this work, we focus on $H^\pm \to \mu \nu$ as an alternative channel
in the context of two Higgs doublet model type III. We explored the prospect of
looking $pp\to tb H^\pm$, followed by $H^\pm\to\mu \nu$ signal at the LHC. Such
a scenario appears in 2HDM type-III where couplings of the charged Higgs are
enhanced to $\mu\nu$. Almost all the experimental searches rely on the
production and decay of the charged Higgs are taken into account. We show that
for a such scenario, the above signal is dominant for most of the parameter
space, and $H^\pm \to \mu\nu$ can be an excellent complementary search.
Benchmarks points are proposed for further Monte Carlo analysis.

High Energy Physics - Phenomenology