We report on the first direct search for charged Higgs bosons decaying into cs in tt events produced by pp collisions at s=1.96-TeV. The search uses a data sample corresponding to an integrated luminosity of 2.2-fb-1 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(t†'H+b)< 0.1 to 0.3 for charged Higgs boson masses of 60 to 150-GeV/c2 assuming B(H+†'cs)=1.0. The upper limits on B(t†'H+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. © 2009 The American Physical Society.
Publication Source (Journal or Book title)
Physical Review Letters
Aaltonen, T., Adelman, J., Akimoto, T., Ãlvarez Gonzãlez, B., Amerio, S., Amidei, D., Anastassov, A., Annovi, A., Antos, J., Apollinari, G., Apresyan, A., Arisawa, T., Artikov, A., Ashmanskas, W., Attal, A., Aurisano, A., Azfar, F., Azzurri, P., Badgett, W., Barbaro-Galtieri, A., Barnes, V., Barnett, B., Bartsch, V., Bauer, G., Beauchemin, P., Bedeschi, F., Beecher, D., & Behari, S. (2009). Search for charged higgs bosons in decays of top quarks in pp Collisions at s=1.96-TeV. Physical Review Letters, 103 (10) https://doi.org/10.1103/PhysRevLett.103.101803