Constraints on Scalar Couplings from $\pi^\pm \to l^\pm\nu_l$

Bruce A. Campbell; David W. Maybury

Constraints on Scalar Couplings from π^pm to l^pmν_l

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arxiv hep-ph/0303046 v2 pith:4PZIDR52 submitted 2003-03-05 hep-ph

Constraints on Scalar Couplings from π^pm to l^pmν_l

Bruce A. Campbell , David W. Maybury This is my paper

classification hep-ph

keywords interactionsscalarlimitspseudoscalarinducedarisingbeta-decaybeyond

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New interactions with Lorentz scalar structure, arising from physics beyond the standard model of electroweak interactions, will induce effective pseudoscalar interactions after renormalization by weak interaction loop corrections. Such induced pseudoscalar interactions are strongly constrained by data on $\pi^\pm \to l^\pm \nu_l$ decay. These limits on induced pseudoscalar interactions imply limits on the underlying fundamental scalar interactions that in many cases are substantially stronger than limits on scalar interactions from direct Beta-decay searches.

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