# Ansatz for small FCNC with a non-universal $Z^prime$ - High Energy Physics - Phenomenology

Ansatz for small FCNC with a non-universal $Z^prime$ - High Energy Physics - Phenomenology - Download this document for free, or read online. Document in PDF available to download.

Abstract: It is well known that a non-universal $Z^\prime$ induces tree-level FCNCwhich are severely constrained by experiment, most notably meson mixing. Wepoint out that there is a class of models, with a down-quark mass matrix of theGeorgi-Jarlskog form, in which the FCNC in the down-type quark sector vanish orare strongly suppressed. The largest FCNC in these models would occur in the$tc$ transition with a strength comparable to $V {ts}$.

Author: Xiao-Gang He, German Valencia

Source: https://arxiv.org/