Seminar on Hadron Physics

Date and Time: Friday, 22 December 2017, at 11:00 AM

Venue: Blokhintsev Hall (4th floor), Bogoliubov Laboratory of Theoretical Physics

Seminar topic: «Mending ρππ vertex through the πa₁ diagonalization»

Speaker: A. A. Osipov

Abstract:

The problem of the strong momentum dependence of the ρππ-vertex in the extended Nambu–Jona-Lasinio model is solved by an appropriate choice of fields for spin-1 particles. A corresponding phenomenological Lagrangian is derived. As straightforward applications, the decay widths of ρ → ππ, and a₁ → ρπ transitions are calculated and compared with known phenomenological data and previous theoretical estimates.