Search for charged Higgs bosons in top quark decays

0339427 - FZÚ 2010 RIV NL eng J - Článek v odborném periodiku
Abazov, V. M. - Abbott, B. - Abolins, M. - Kupčo, Alexander - Lokajíček, Miloš
Search for charged Higgs bosons in top quark decays.
Physics Letters. B. Roč. 682, č. 3 (2009), 278-286. ISSN 0370-2693. E-ISSN 1873-2445
Grant CEP: GA MŠMT LC527; GA MŠMT LA08047
Výzkumný záměr: CEZ:AV0Z10100502
Klíčová slova: D0 * Tevatron * Higgs
Kód oboru RIV: BF - Elementární částice a fyzika vys. energií
Impakt faktor: 5.083, rok: 2009
http://arxiv.org/abs/0908.1811

We present a search for charged Higgs bosons in top quark decays. We analyze the /eplus, /muplus, $ee$, $e/mu$, $/mu/mu$, /etau and /mutau final states from top quark pair production events, using data from about 1${/text{fb}}^{-1}$ of integrated luminosity recorded by the /dzero 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 τ lepton and a τ neutrino and a third one where both decays appear. We extract limits on the branching ratio $B(t/to H^+ b)$ for all these models. We use two methods, one where the $t/bar{t}$ production cross section is fixed, and one where the cross section is fitted simultaneously with $B(t/to H^+b)$. Based on the extracted limits, we exclude regions in the charged Higgs boson mass and $/tan /beta$ parameter space.
Trvalý link: http://hdl.handle.net/11104/0182953