  The charged Higgs bosons can be produced as a resonance in s-channel single
top events. The light charged Higgs in such events preferably decays to a pair
of $\tau \nu$ thus making it difficult to distinguish from the large single W
events producing the same final state. However, the heavy charged Higgs decay
to a pair of $t \bar{b}$ can be extracted from the SM background events. The
final state under consideration in this paper contains the top quark decay to
$W^+ b$ followed by $W^+$ decay to electrons or muons. It is shown that this
signal can be observed at LHC at a large area of MSSM phase space ($m(H^+),
tan\beta$). Finally $5\sigma$ and 95% CL exclusion contours are presented at
different integrated luminosities of LHC assuming a nominal center of mass
energy of $\sqrt{s}$ = 14 TeV.

High Energy Physics - Phenomenology