Implications of BNL measurement of δa_μ on scalar leptoquark mass and coupling

Details Implications of BNL measurement of δa_μ on scalar leptoquark mass and coupling Implications of BNL measurement of δa_μ on scalar leptoquark mass and coupling

2001-02-14

arxiv.org/abs/hep-ph/0102176v4

Eur.Phys.J.C21:171-173,2001

Physics

High Energy Physics

High Energy Physics - Phenomenology

Few references added

Scientific paper

10.1007/s100520100705 10.1016/S0

Recently BNL have measured the muon magnetic moment anomaly with increased precision. The world average experimental value at present shows a discrepancy of 43(16)\times 10^{-10} from the Standard Model value. In this paper we investigate the implications of this difference on a class of scalar leptoquark interactions to SM quark-lepton pair. We find that for leptoquarks in the few hundred Gev range the BNL muon anomaly could arise from leptoquark couplings that are much smaller than the electromagnetic coupling. We also find that the BNL value for the muon anomaly leads to an unambiguous prediction for the electric dipole moment of the muon and a bound on the flavor changing leptoquark coupling relevant for the rare decay \mu\to e\gamma.

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