Eur. Phys. J. C (2007) 52: 665-672
https://doi.org/10.1140/epjc/s10052-007-0396-2

Regular Article - Theoretical Physics

Signature of heavy charged Higgs boson at LHC in the 1 and 3 prong hadronic tau decay channels

¹ Department of High Energy Physics, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai, 400005, India
² Helsinki Institute of Physics, Helsinki, Finland
³ Homi Bhabha Centre for Science Education, Tata Institute of Fundamental Research, V.N. Purav Marg, Mumbai, 400088, India

^* e-mail: guchait@tifr.res.in

Received: 17 May 2007
Revised: 5 July 2007
Accepted: 5 July 2007
Published online: 13 September 2007

Abstract

We have done a fast simulation analysis of the H^± signal at LHC in 1 and 3 prong hadronic τ-jet channels along with a tt̄ background. The τ polarization was effectively used to suppress the background in both channels. Combining this with appropriate cuts on p_T of the τ-jet, the missing E_T and the azimuthal angle between them reduces the background below the signal level. Consequently, one gets a viable H^± signal up to a mass range of 600–700 GeV at moderate to large tanβ.