Non-Universal Correction To $Z \to b {\bar{b}}$ And Flavor Changing Neutral Current Couplings

Details Non-Universal Correction To $Z \to b {\bar{b}}$ And Flavor Changing Neutral Current Couplings Non-Universal Correction To $Z \to b {\bar{b}}$ And Flavor Changing Neutral Current Couplings

1995-01-04

arxiv.org/abs/hep-ph/9501212v1

Phys.Rev. D51 (1995) 6584-6586

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, TeX

Scientific paper

10.1103/PhysRevD.51.6584

A non-universal interaction associated with top quark induces flavor changing neutral currents (FCNC) among light fermions. The size of the FCNC effect depends crucially on the dynamics of the fermion mass generation. In this paper, we study the effect of a non-universal interaction on $Z b b$, $Z b s$ {\it etc}, by using an effective lagrangian technique and assuming the quark mass matrices in the form of a generalized Fritzsch ansatz. We point out that if fitting $R_b$ to the LEP data within $1 \sigma$, the induced FCNC couplings are very close to the experimental limits.

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