Flavor changing neutral currents with a fourth family of quarks

Abstract

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_{tb}| significantly different from unity, large rates for rare top decays as t->cγand t->cZ, the last one reachable at the Large Hadrion Collider, and large rates for rare strange decays s->dγand s->dg, where g stands for the gluon field.

7 pages, one figure. Published on Physical Review D

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Cited by in corpus (15)

• The Hunt for New Physics at the Large Hadron Collider
• The 3-3-1 model with A_4 flavor symmetry
• Constraints on the Four-Generation Quark Mixing Matrix from a Fit to Flavor-Physics Data
• Scalar Dark Matter and Standard Model with Four Generations
• CP violation and the 4th generation
• The Lepton Sector of a Fourth Generation
• Effects of quark family nonuniversality in SU(3)_c X SU(4)_L X U(1)_x models
• Single Production of Fourth Family $t^{\prime }$ Quarks at LHeC
• Anomalous resonant production of the fourth family up type quarks at the LHC
• Complementarity of Semileptonic $B$ to $K_2^{\ast }(1430)$ and $K^{\ast }(892)$ Decays in the Standard Model with Fourth Generation
• Anomalous single production of fourth family up type quark associated with neutral gauge bosons at the LHC
• Lepton polarization asymmetry in $B_{(}s,d{)}^{\ast }$ arrow ${\mu }^{+}{\mu }^{-}$ with new Z' couplings
• Semileptonic B to Scalar meson Decays in the Standard Model with Fourth Generation
• Higgs Mass Constraints on a Fourth Family: Upper and Lower Limits on CKM Mixing
• Bounding CKM Mixing with a Fourth Family