New Vector Boson Near the Z-pole and the Puzzle in Precision Electroweak Data
High Energy Physics - Phenomenology
2011-09-08 v1 High Energy Physics - Experiment
Abstract
We show that a Z' with suppressed couplings to the electron compared to the Z-boson, with couplings to the b-quark, and with a mass close to the mass of the Z-boson, provides an excellent fit to forward-backward asymmetry of the b-quark and R_b measured on the Z-pole and GeV off the Z-pole, and to A_e obtained from the measurement of left-right asymmetry for hadronic final states. It also leads to a significant improvement in the total hadronic cross section on the Z-pole and R_b measured at energies above the Z-pole. In addition, with a proper mass, it can explain the excess of events at LEP in the 90-105 GeV region of the invariant mass.
Cite
@article{arxiv.1105.0773,
title = {New Vector Boson Near the Z-pole and the Puzzle in Precision Electroweak Data},
author = {Radovan Dermisek and Sung-Gi Kim and Aditi Raval},
journal= {arXiv preprint arXiv:1105.0773},
year = {2011}
}
Comments
10 pages, 1 figure