Resonant and nonresonant D+ -> K- pi+ l+ nu(l) semileptonic decays

Details Resonant and nonresonant D+ -> K- pi+ l+ nu(l) semileptonic decays Resonant and nonresonant D+ -> K- pi+ l+ nu(l) semileptonic decays

1997-10-21

arxiv.org/abs/hep-ph/9710422v2

Phys.Rev. D58 (1998) 054009

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, 3 Postscript figures, standard Latex, extended revision, title, abstract and text (especially Sec. IV) changed, resu

Scientific paper

10.1103/PhysRevD.58.054009

We analyse the semileptonic decay D+ -> K- pi+ l+ nu(l) using an effective Lagrangian developed previously to describe the decays D -> P l nu(l) and D -> V l nu(l). Light vector mesons are included in the model which combines the heavy quark effective Lagrangian and chiral perturbation theory approach. The nonresonant and resonant contributions are compared. With no new parameters the model correctly reproduces the measured ratio Gamma(nres)/Gamma(nres + res). We also present useful nonresonant decay distributions. Finally, a similar model, but with a modified current which satisfies the soft pion theorems at the expense of introducing another parameter, is analyzed and the results of the models are compared.

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