η-γ and η′-γ Transition form factors in a nonlocal NJL model
| Autor: | Gómez Dumm, Daniel Alberto, Noguera, S., Scoccola, Norberto Nerio |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
purl.org/becyt/ford/1 [https]
Chiral symmetry Astronomía Relativistic quark model High Energy Physics::Lattice Ciencias Físicas Nuclear Theory High Energy Physics::Phenomenology Física High Energy Physics::Experiment purl.org/becyt/ford/1.3 [https] Quantum chromodynamics CIENCIAS NATURALES Y EXACTAS |
| Zdroj: | CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET |
| DOI: | 10.1103/PhysRevD.95.054006 |
| Popis: | We study the η and η′ distribution amplitudes (DAs) in the context of a nonlocal SU(3)L - SU(3)R chiral quark model. The corresponding Lagrangian allows us to reproduce the phenomenological values of pseudoscalar meson masses and decay constants, as well as the momentum dependence of the quark propagator arising from lattice calculations. It is found that the obtained DAs have two symmetric maxima, which arise from new contributions generated by the nonlocal character of the interactions. These DAs are then applied to the calculation of the η-γ and η′-γ transition form factors. Implications of our results regarding higher twist corrections and/or contributions to the transition form factors originated by gluon-gluon components in the η and η′ mesons are discussed. Instituto de Física La Plata Consejo Nacional de Investigaciones Científicas y Técnicas |
| Databáze: | OpenAIRE |
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