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

DØ Collaboration

Research output: Contribution to journalArticle

32 Scopus citations

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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