Hadrophilic Z':a bridge from LEP1, SLC and CDF to LEP2 anomalies

Details Hadrophilic Z':a bridge from LEP1, SLC and CDF to LEP2 anomalies Hadrophilic Z':a bridge from LEP1, SLC and CDF to LEP2 anomalies

1996-01-22

arxiv.org/abs/hep-ph/9601306v2

Phys.Rev.D54:789-797,1996

Physics

High Energy Physics

High Energy Physics - Phenomenology

24 pages , 5 Postscript figures, Acknowledgements

Scientific paper

10.1103/PhysRevD.54.789

In order to explain possible departures from the Standard Model predictions for $b\bar b$ and $c\bar c$ production at $Z$ peak, we propose the existence of a $Z'$ vector boson with enhanced couplings to quarks. We first show that this proposal is perfectly consistent with the full set of LEP1/SLC results. In particular, $Z-Z'$ mixing effects naturally explain the fact that $\Gamma_b$ and $\Gamma_c$ deviate from the SM in opposite directions. We then show that there is a predicted range for enhanced $Z'q\bar q$ couplings which explains, for a precise and interesting range of $Z'$ masses, the excess of dijet events seen at CDF. A $Z'$ with such couplings and mass would produce clean observable effects in $b\bar b$ and in total hadronic production at LEP2.

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