Remarks on the W propagator at the resonance

G. Lopez Castro , J. L. Lucio M. , J. Pestieau

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classification ✦ hep-ph

keywords propagatorresonanceaddressattentiondefiningdiscusslongitudinalpaid

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We address the problem of properly defining the $W^{\pm}, Z^0$ propagator in the resonance region. Particular attention is paid to the longitudinal piece of this propagator. We also discuss the related renormalization procedures and the unitarity property.

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Remarks on the W propagator at the resonance

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