The $Z\to b\bar{b}$ Decay Asymmetry and Left-Right Models

Abstract

It has been pointed out recently by Chanowitz that the $Z\to b\bar{b}$ decay asymmetry poses a problem for the standard model whether it is genuine or not [Chanowitz:2001bv]. If this conflict is interpreted as new physics in the b-quark couplings, it suggests a rather large right handed coupling of the b-quark to the Z-boson. We show that it is possible to accommodate this result in left-right models that single out the third generation.

18 pages, Revtex. Version to appear in PRD, One figure added

References in corpus (4)

• Branching Fraction and Photon Energy Spectrum b -> s gamma
• Beautiful Mirrors and Precision Electroweak Data
• The Z ->anti-b b decay asymmetry: lose-lose for the Standard Model
• Indication for Light Sneutrinos and Gauginos from Precision Electroweak Data

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