Search for charged Higgs bosons in top quark decays
2009 (English)In: Physics Letters B, ISSN 0370-2693, Vol. 682, no 3, 278-286 p.Article in journal (Refereed) Published
We present a search for charged Higgs bosons in top quark decays. We analyze the e + jets, mu + jets, ee, e mu, mu mu, tau e and tau mu final states from top quark pair production events, using data from about 1 fb (1) of integrated luminosity recorded by the DO experiment at the Fermilab Tevatron Collider. We consider different scenarios of possible charged Higgs boson decays, one where the charged Higgs boson decays purely hadronically into a charm and a strange quark, another where it decays into a tau lepton and a tau neutrino and a third one where both decays appear. We extract limits on the branching ratio B(t -> H(+)b) for all these models. We use two methods, one where the t (t) over bar production cross section is fixed, and one where the cross section is fitted simultaneously with B(t -> H(+)b). Based on the extracted limits, we exclude regions in the charged Higgs boson mass and tan beta parameter space for different scenarios of the minimal supersymmetric standard model.
Place, publisher, year, edition, pages
2009. Vol. 682, no 3, 278-286 p.
IdentifiersURN: urn:nbn:se:kth:diva-72069DOI: 10.1016/j.physletb.2009.11.016ISI: 000274533100003OAI: oai:DiVA.org:kth-72069DiVA: diva2:487701
QC 201201312012-01-312012-01-312012-01-31Bibliographically approved