Year: 2015
Type: article
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 $D\ensuremath{\rightarrow}\ensuremath{\pi}{e}^{+}{\ensuremath{\nu}}_{e}$.
Authors: Benjamín Grinstein, Richard F. Lebed
Institution: University of California San Diego
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2174527331