Search for charged Higgs bosons in top quark decays

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Research output: Contribution to journalArticlepeer-review

117 Citations (Scopus)

Abstract

We present a search for charged Higgs bosons in top quark decays. We analyze the e + jets, μ + jets, ee, eμ, μμ, τe and τμ final states from top quark pair production events, using data from about 1 fb-1 of integrated luminosity recorded by the DØ 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 → H+ b) for all these models. We use two methods, one where the t over(t, ̄) 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 β parameter space for different scenarios of the minimal supersymmetric standard model.

Original languageEnglish
Pages (from-to)278-286
Number of pages9
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume682
Issue number3
DOIs
Publication statusPublished - 2009 Dec 7

Bibliographical note

Funding Information:
We thank the staffs at Fermilab and collaborating institutions, and acknowledge support from the DOE and NSF (USA) ; CEA and CNRS/IN2P3 (France) ; FASI, Rosatom and RFBR (Russia) ; CNPq, FAPERJ, FAPESP and FUNDUNESP (Brazil) ; DAE and DST (India) ; Colciencias (Colombia) ; CONACyT (Mexico) ; KRF and KOSEF (Korea) ; CONICET and UBACyT (Argentina) ; FOM (The Netherlands) ; STFC and the Royal Society (United Kingdom) ; MSMT and GACR (Czech Republic) ; CRC Program, CFI, NSERC and WestGrid Project (Canada) ; BMBF and DFG (Germany) ; SFI (Ireland) ; The Swedish Research Council (Sweden) ; CAS and CNSF (China) ; and the Alexander von Humboldt Foundation (Germany) . We would also like to thank J.S. Lee and A. Pilaftsis for providing us with the CPX gh model and many stimulating discussions.

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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