Reference : Pion-photon transition distribution amplitudes in the Nambu-Jona-Lasinio model
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/2268/127175
Pion-photon transition distribution amplitudes in the Nambu-Jona-Lasinio model
English
Courtoy, Aurore mailto [Departamento de Fisica Teorica, Instituto de Física Corpuscular, Universidad de Valencia-CSIC, E-46100 Burjassot (Valencia), Spain > > > >]
Noguera, S. [Departamento de Fisica Teorica, Instituto de Física Corpuscular, Universidad de Valencia-CSIC, E-46100 Burjassot (Valencia), Spain > > > >]
2007
Physical Review. D, Particles, Fields, Gravitation, and Cosmology
76
9
Yes (verified by ORBi)
International
1550-7998
1550-2368
[en] We define the pion-photon transition distribution amplitudes (TDA) in a field theoretic formalism from a covariant Bethe-Salpeter approach for the determination of the bound state. We apply our formalism to the Nambu-Jona-Lasinio model, as a realistic theory of the pion. The obtained vector and axial TDAs satisfy all features required by general considerations. In particular, sum rules and the polynomiality condition are explicitly verified. We have numerically proved that the odd coefficients in the polynomiality expansion of the vector TDA vanish in the chiral limit. The role of PCAC and the presence of a pion pole are explicitly shown. © 2007 The American Physical Society.
http://hdl.handle.net/2268/127175
10.1103/PhysRevD.76.094026

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