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

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

2002-03-05

arxiv.org/abs/hep-ph/0203036v2

Phys.Rev. D66 (2002) 013004; Erratum-ibid. D66 (2002) 079901

Physics

High Energy Physics

High Energy Physics - Phenomenology

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

Scientific paper

10.1103/PhysRevD.66.013004

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.

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