Search for a Fourth Generation Charge -1/3 Quark via Flavor Changing Neutral Current Decay

Dø Collaboration

    Research output: Contribution to journalArticle

    Abstract

    We report on a search for pair production of a fourth generation charge -1/3 quark (b’) in pp collisions at s = 1.8 TeV by the DØ experiment at the Fermilab Tevatron using an integrated luminosity of 93 pb-1. Both b’ quarks are assumed to decay via flavor changing neutral currents (FCNC). The search uses the signatures γ + 3 jets + μ-tag and 2γ + 2 jets. We see no significant excess of events over the expected background. We place an upper limit on the production cross section times branching fraction that is well below theoretical expectations for a b’ decaying exclusively via FCNC for b’ masses up to mz + mb.

    Original languageEnglish (US)
    Pages (from-to)3818-3823
    Number of pages6
    JournalPhysical Review Letters
    Volume78
    Issue number20
    DOIs
    StatePublished - 1997

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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