Search for Charged Higgs Bosons in Decays of Top Quarks in pp¯ Collisions at s=1.96TeV

T. Aaltonen et al. (CDF Collaboration)
Phys. Rev. Lett. 103, 101803 – Published 4 September 2009

Abstract

We report on the first direct search for charged Higgs bosons decaying into cs¯ in tt¯ events produced by pp¯ collisions at s=1.96TeV. The search uses a data sample corresponding to an integrated luminosity of 2.2fb1 collected by the CDF II detector at Fermilab and looks for a resonance in the invariant mass distribution of two jets in the lepton+jets sample of tt¯ candidates. We observe no evidence of charged Higgs bosons in top quark decays. Hence, 95% upper limits on the top quark decay branching ratio are placed at B(tH+b)< 0.1 to 0.3 for charged Higgs boson masses of 60 to 150GeV/c2 assuming B(H+cs¯)=1.0. The upper limits on B(tH+b) are also used as model-independent limits on the decay branching ratio of top quarks to generic scalar charged bosons beyond the standard model.

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  • Received 8 July 2009

DOI:https://doi.org/10.1103/PhysRevLett.103.101803

©2009 American Physical Society

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Vol. 103, Iss. 10 — 4 September 2009

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