Pion as a Longitudinal Axial-Vector Meson (q bar q) Bound State (Prof. T.N.Pham)
Event
- Title:
- Pion as a Longitudinal Axial-Vector Meson (q bar q) Bound State (Prof. T.N.Pham)
- When:
- Wed, 12. June 2013, 16:00 - 18:00
- Where:
- Bari,
- Category:
- Seminari
Description
Il giorno 12 giugno 2013, alle ore 16.00 in saletta riunioni, il Prof. T.N.Pham, del Centre de Physique Theorique, CNRS, Ecole Polytechnique, Palaiseau, France, terra' un seminario dal titolo:
Pion as a Longitudinal Axial-Vector Meson q bar q Bound State
Abstract: The agreement with experiment of the chiral anomaly prediction for the pi^0 to gamma gamma decay rate implies that other contributions like the q bar q bound state contribution, would be suppressed as shown by the Sutherland-Veltman theorem in the soft pion limit. In this talk, I would like to discuss a recent work in which we consider the pion to be a longitudinal axial-vector meson q bar q bound state. We show that, if the pion behaves as a longitudinal axial-vector meson q bar q bound state, then the momentum-dependence pion Bethe-Salpeter wave function could produce a suppressed pi^0 to gamma gamma decay amplitude in the soft pion limit, in agreement with the Sutherland-Veltman theorem and would explain the success of the chiral anomaly prediction for the pi^0 to gamma gamma decay rate.
Persona di contatto:Pietro Colangelo This email address is being protected from spambots. You need JavaScript enabled to view it.Telefono:390805443210
Relatore:Prof. Tri-Nang Pham (Ecole Polytechnique - Palaiseeau - France)
