TWO PHOTON DECAYS OF PION IN BETHE–SALPETER FRAMEWORK WITH GENERALIZED STRUCTURE OF HADRON-QUARK VERTEX-Reference-Cited by-同舟云学术

TWO PHOTON DECAYS OF PION IN BETHE–SALPETER FRAMEWORK WITH GENERALIZED STRUCTURE OF HADRON-QUARK VERTEX

Published:2008-03 Issue:03 Volume:17 Page:519-530
ISSN:0218-3013
Container-title:International Journal of Modern Physics E
language:en
Short-container-title:Int. J. Mod. Phys. E

Author:

BHATNAGAR SHASHANK¹²

Affiliation:

1. Department of Physics, Addis Ababa University, P.O. Box 101739, Addis Ababa, Ethiopia

2. Abdus Salam International Center for Theoretical Physics (ICTP), Trieste, Italy

Abstract

Two photon decays of pion are studied in the framework of the Bethe–Salpeter equation under Covariant Instantaneous Ansatz where the structure of hadron-quark vertex function Γ is generalized to include various Dirac covariants (other than γ5) from their complete set. These covariants are incorporated in accordance with a power counting rule (which was recently employed to calculate leptonic decays constants of pseudoscalar mesons and vector mesons) order by order in powers of the inverse of the meson mass. Pion-photon coupling constant Fπ is calculated with the incorporation of leading order covariants.

Publisher

World Scientific Pub Co Pte Lt

Subject

General Physics and Astronomy,Nuclear and High Energy Physics

Link

https://www.worldscientific.com/doi/pdf/10.1142/S0218301308009835

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