Reconciling the LEP and Slac Measurements of Sin^2(Θ_W)

Details Reconciling the LEP and Slac Measurements of Sin^2(Θ_W) Reconciling the LEP and Slac Measurements of Sin^2(Θ_W)

1994-10-19

arxiv.org/abs/hep-ph/9410322v1

Phys.Lett. B346 (1995) 159-164

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages , CERN-TH.7474/94, OUTP9424P

Scientific paper

10.1016/0370-2693(94)01628-P

We consider whether a discrepancy between the SLAC and LEP measurements of $\Sw$ can be explained by new physics. We find that only the contribution of a new neutral gauge boson, $Z^\prime$, nearly degenerate with the Z can affect the SLAC measurement while leaving the LEP observables almost unaffected. We briefly discuss possible signals for this new gauge boson, including changes in the $Z$ lineshape when measured with polarised electrons, small changes in $R_b$, $A^e_{FB}$, and larger changes in two jet and $t\bar{t}$ production at hadron colliders.

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