Generalized heavytolight form factors in lightcone sum rules
Abstract
We study the form factors for a heavy meson into the Swave Kπ/ππ system with an invariant mass below 1 GeV. The mesonic final state interactions are described in terms of the scalar form factors, which are obtained from unitarized chiral perturbation theory. Employing generalized lightcone distribution amplitudes, we compute the heavytolight transition using lightcone sum rules. Our approach simultaneously respects constraints from analyticity and unitarity, and also takes advantage of the power expansion in the 1/m_{b} and the strong coupling constant.
 Publication:

Physics Letters B
 Pub Date:
 March 2014
 DOI:
 10.1016/j.physletb.2014.02.009
 arXiv:
 arXiv:1312.3087
 Bibcode:
 2014PhLB..730..336M
 Keywords:

 High Energy Physics  Phenomenology;
 High Energy Physics  Experiment
 EPrint:
 8 pages, 3 figures, v2: 11 pages, 3 figures, title changed, some clarifications and references added, matches version to appear in Physics Letters B