Flavor changing neutral currents with a fourth family of quarks

Journal Article · Wed Oct 01 04:00:00 EDT 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.78.073008· OSTI ID:21254262

Herrera, Johana A; Benavides, Richard H; Ponce, William A ^[1]

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1. Instituto de Fisica, Universidad de Antioquia, A.A. 1226, Medellin (Colombia)

For a model with a fourth family of quarks, new sources of flavor changing neutral currents are identified by confronting the unitary 4x4 quark mixing matrix with the experimental measured values of the familiar 3x3 quark mixing matrix. By imposing as experimental constraints the known bounds for the flavor changing neutral currents, the largest mixing of the known quarks with the fourth family ones is established. The predictions are: a value for |V{sub tb}| significantly different from unity, large rates for rare top decays as t{yields}c{gamma} and t{yields}cZ, the last one reachable at the Large Hadron Collider, and large rates for rare strange decays s{yields}d{gamma} and s{yields}dg, where g stands for the gluon field, both processes reachable at the existing B factories.

• OSTI ID: 21254262
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 7 Vol. 78; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CERN LHC
FLAVOR MODEL
FORECASTING
GLUONS
MESON FACTORIES
MIXING
NEUTRAL CURRENTS
PARTICLE DECAY
QUARKS