Ansatz for small FCNC with a non-universal Z′

Xiao Gang He, G. Valencia

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23 Citations (Scopus)


It is well known that a non-universal Z induces tree-level FCNC which are severely constrained by experiment, most notably meson mixing. We point out that there is a class of models, with a down-quark mass matrix of the Georgi-Jarlskog form, in which the FCNC in the down-type quark sector vanish or are strongly suppressed. The largest FCNC in these models would occur in the tc transition with a strength comparable to Vt s.

Original languageEnglish
Pages (from-to)72-75
Number of pages4
JournalPhysics Letters B
Issue number1
Publication statusPublished - 14 Sept 2009
Externally publishedYes

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