Pion distribution amplitude and the pion-photon transition form factor in a nonlocal chiral quark model
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Pion distribution amplitude and the pion-photon transition form factor in a nonlocal chiral quark model

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Pion distribution amplitude and the pion-photon transition form factor in a nonlocal chiral quark model

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Gómez Dumm, Daniel; Noguera Puchol, Santiago Perfil; Scoccola, N.N.; Scopetta, Sergio
Aquest document és un/a article, creat/da en: 2014
We study the pion distribution amplitude (pi DA) in the context of a nonlocal chiral quark model. The corresponding Lagrangian reproduces the phenomenological values of the pion mass and decay constant, as well as the momentum dependence of the quark propagator obtained in lattice calculations. It is found that the obtained pi DA has two symmetric maxima, which arise from the new contributions generated by the nonlocal character of the interactions. This pi DA is applied to leading order and next-to-leading order calculations of the pion-photon transition form factor. Implications of the results are discussed.

    Gomez Dumm, D. Noguera Puchol, Santiago Scoccola, N.N. Scopetta, Sergio 2014 Pion distribution amplitude and the pion-photon transition form factor in a nonlocal chiral quark model Physical Review D 89 5 054031
http://dx.doi.org/10.1103/PhysRevD.89.054031
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