August 28, 2011 to September 2, 2011
US/Central timezone
Slides available on Indico -- there are no formal proceedings

New Vector Boson Near the Z-pole and the Puzzle in Precision Electroweak Data

Sep 1, 2011, 12:15 PM
C: Hornets Nest WH8NX

C: Hornets Nest WH8NX


Prof. Radovan Dermisek (Indiana University)


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, near the Z-pole and above 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 $Zb\bar b$ events at LEP in the 90-105 GeV region of the $b\bar b$ invariant mass. With additional small flavor violating couplings it can explain the discrepancy in muon g-2, and the like-sign dimuon anomaly measured by D0.

Presentation materials