Lecture on a Z' Coupled to Beauty and Truth

Details Lecture on a Z' Coupled to Beauty and Truth Lecture on a Z' Coupled to Beauty and Truth

1996-10-10

arxiv.org/abs/hep-ph/9610320v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, latex including 3 Figures. Lecture at Ettore Majorana International School of Subnuclear Physics, Erice, Sicily, Jul

Scientific paper

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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