2006/01/04 by Svjetlana Fajfer, Jernej F. Kamenik, Jernej Kamenik
Engineering · Physics and Astronomy · #Amplitude #Charm (quantum number) #Helicity #Meson #Particle Accelerators and Free-Electron Lasers #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #hep-ph
paper · pdf · doi:10.1103/physrevd.73.057503
published as Phys.Rev.D73:057503,2006 · 4 pages, 5 figures
arxiv created 2006/01/04 · openalex publication_date 2006/03/15 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Motivated by the recent extraction of the helicity amplitudes for the D+\ensuremath→K*0\ensuremathμ\ensuremathν_\ensuremathμ decay, done by the FOCUS collaboration, we determine helicity amplitudes for the D+\ensuremath→K*0l\ensuremathνl, D+\ensuremath→\ensuremathρ0l\ensuremathνl and Ds+\ensuremath→\ensuremathφl\ensuremathνl semileptonic decays using the knowledge of the relevant form factors. The vector and axial form factors for D\ensuremath→Vl\ensuremathνl decays are parametrized by including contributions of charm meson resonances and using the HQET and SCET limits. In the case that the vector form factor receives contributions from two poles while axial form factors are dominated by a single pole for D+\ensuremath→K*0l\ensuremathνl, we obtain better agreement with the experimental result then when all of them are dominated by single poles.