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Lecture on a Z' Coupled to Beauty and Truth

P. H. Frampton
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Abstract

By extending the standard gauge group to $SU(3)_c \times SU(2)_L \times U(1)_Y \times U(1)_X$ with $X$ charges carried only by the third family we accommodate the LEP measurement of $R_b$ and predict a potentially measurable discrepancy in $A_{FB}^{b}$ in $e^+e^-$ scattering and that $D^0 \bar D^0$ mixing may be near its experimental limit. The uniqueness of our model is that the Z' couplings are generation-dependent and hence explicitly violate the GIM mechanism, but can nevertheless be naturally consistent with FCNC constraints. Direct detection of this Z' is possible but challenging.

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P. H. Frampton. 1996-10-10. Lecture on a Z' Coupled to Beauty and Truth. https://arxiv.org/abs/hep-ph/9610320

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