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Zeitschrift für Physik C
ISSN: 0170-9739 (printed version)
ISSN: 1431-5858 (electronic version)
Abstract Volume 74 Issue 3 (1997) pp 561-569
Z->bb\= in a composite model of fermions
Pham Quang Hung
Department of Physics, University of Virginia, Charlottesville, VA 22901, USA
Received: 19 June 1996
Abstract. A composite model of fermions is proposed to explain the "anomaly" in Z->bb\= and, to a lesser extent, in Z->cc\=. It contains a nonsequential fourth family whose mass of one member (the charge -1/3 quark) is constrained to be between 47 GeV and 49 GeV. The charge +2/3 quark is constrained to lie between 67 GeV and 107 GeV. This opens up the exciting prospect for near-future discoveries at LEP2 and possibly at the Tevatron.
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