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arXiv · hep-ph/9410322

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

F. Caravaglios·G. G. Ross
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Abstract

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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F. Caravaglios, G. G. Ross. 1994-10-19. Reconciling the LEP and Slac Measurements of Sin^2(Θ_W). https://doi.org/10.1016/0370-2693(94)01628-p

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