Above-threshold poles in model-independent form factor parametrizations

Benjamín Grinstein, Richard Lebed

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Abstract

The model-independent parametrization for exclusive hadronic form factors commonly used for semileptonic decays is generalized to allow for the inclusion of above-threshold resonant poles of known mass and width. We discuss the interpretation of such poles, particularly with respect to the analytic structure of the relevant two-point Green's function in which they reside. Their presence has a remarkably small effect on the parametrization, as we show explicitly for the case of D→πe+νe.

Original languageEnglish (US)
Article number116001
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume92
Issue number11
DOIs
Publication statusPublished - Dec 1 2015

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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