por
Alexandr Pimikov
(Universidad de Valencia - IFIC)
→
Europe/Madrid
Sala Seminarios (Dpto. de Física Teórica (UVEG))
Sala Seminarios
Dpto. de Física Teórica (UVEG)
Descripción
We study the pion structure in terms of the leading twist pion distribution amplitude, the electromagnetic form factor, and the transition pion-photon form factor in framework of QCD sum rules with nonlocal condensate and light-cone sum rules. A global fit of pion distribution amplitude to the data from different collaborations (CELLO, CLEO, BaBar) on the pion-photon transition form factor is carried out using light-cone sum rules. The analysis includes the next-to-leading QCD radiative corrections and the twist-four contributions, while the main next-to-next-to-leading term and the twist-six contribution are taken into account in the form of theoretical uncertainties.