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The single top production proceeds through different channels at LHC. Thet-channel production which has a cross section at the level of one third of thettbar, can be regarded as a source of light charged Higgs boson through topquark decay to charged Higgs. Due to the low jet multiplicity andcharacteristic kinematic features of this process, a signal selection can bedesigned to extract charged Higgs signal from the background processes. In thispaper, taking MSSM as the theoretical framework, The light charged Higgs signalfrom single top events is analyzed. The charged Higgs is assumed to decay totau nu and the hadronic decay of tau leptons is analyzed. Different chargedHiggs mass hypotheses are analyzed and a scan over the parameter space(mH+,tanbeta) is performed. It is shown that this process has the potential toexclude large areas of parameter space, while with enough data, a 5 sigmadiscovery would also be possible. Finally 95% C.L. exclusion and 5 sigmacontours are provided for different integrated luminosities of LHC.

Single Top Events as a Source of Light Charged Higgs in the Fully Hadronic Final State at LHC