Search for charged Higgs bosons decaying to top and bottom quarks in ppbar collisions

TL;DR

This paper reports a search for charged Higgs bosons decaying to top and bottom quarks at the Fermilab Tevatron, setting upper limits on production cross sections and excluding certain parameter regions in two-Higgs-doublet models.

Contribution

First search for charged Higgs bosons in the tar{b} final state at Tevatron energies, providing new constraints on 2HDM parameters.

Findings

No evidence for charged Higgs production found.

Upper limits set on production cross sections.

Excluded regions in the (M_{H^+},taneta) parameter space.

Abstract

We describe a search for production of a charged Higgs boson, q \bar{q'} -> H^+, reconstructed in the t\bar{b} final state in the mass range 180 <= M_{H^+} <= 300 GeV. The search was undertaken at the Fermilab Tevatron collider with a center-of-mass energy sqrt{s} = 1.96 TeV and uses 0.9 fb^{-1} of data collected with the D0 detector. We find no evidence for charged Higgs boson production and set upper limits on the production cross section in the Types I, II and III two-Higgs-doublet models (2HDMs). An excluded region in the (M_{H^+},tan\beta) plane for Type I 2HDM is presented.