Pion radiative weak decays in nonlocal chiral quark models
We analyze the radiative pion decay π+ → e+νeγ within nonlocal chiral quark models that include wave function renormalization. In this framework we calculate the vector and axial-vector form factors F V and F A at q2 = 0 — where q2 is the e+νe squared invariant mass — and the slope a of F V (q2) at...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2011 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/192757 |
| Acceso en línea: | http://hdl.handle.net/11336/192757 |
| Access Level: | acceso abierto |
| Palabra clave: | NONLOCAL QUARK MODELS PION RADIATIVE WEAK DECAYS https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
| Sumario: | We analyze the radiative pion decay π+ → e+νeγ within nonlocal chiral quark models that include wave function renormalization. In this framework we calculate the vector and axial-vector form factors F V and F A at q2 = 0 — where q2 is the e+νe squared invariant mass — and the slope a of F V (q2) at q2 → 0. The calculations are carried out considering different nonlocal form factors, in particular those taken from lattice QCD evaluations, showing a reasonable agreement with the corresponding experimental data. The comparison of our results with those obtained in the (local) NJL model and the relation of F V and a with the form factor in π0 → γ ∗γ decays are discussed. |
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