Pion radiative weak decays in nonlocal chiral quark models |
| |
Authors: | D. Gó mez Dumm,S. Noguera,N.N. Scoccola |
| |
Affiliation: | 1. IFLP, CONICET — Dpto. de Física, Universidad Nacional de La Plata, C.C. 67, 1900 La Plata, Argentina;2. CONICET, Rivadavia 1917, 1033 Buenos Aires, Argentina;3. Departamento de Física Teórica and Instituto de Física Corpuscular, Universidad de Valencia — CSIC, E-46100 Burjassot (Valencia), Spain;4. Physics Department, Comisión Nacional de Energía Atómica, Av. Libertador 8250, 1429 Buenos Aires, Argentina;5. Universidad Favaloro, Solís 453, 1078 Buenos Aires, Argentina |
| |
Abstract: | 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 FV and FA at q2=0 — where q2 is the e+νe squared invariant mass — and the slope a of FV(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 FV and a with the form factor in π0→γ?γ decays are discussed. |
| |
Keywords: | Nonlocal quark models Pion radiative weak decays |
本文献已被 ScienceDirect 等数据库收录! |
|