FIZIKA B 13 (2004)  2, 483-490

 size 187 kBsize 1031 kB

RADIATIVE WIDTHS OF LIGHT PSEUDOSCALAR MESONS AT 11 GeV VIA THE PRIMAKOFF EFFECT

M. KHANDAKER
for the PrimEx Collaboration

Norfolk State University, Norfolk, Virginia 23504, USA

Received 13 November 2003;   Accepted 12 July 2004
Online 14 November 2004

The spontaneous breaking of chiral symmetry and the chiral anomalies in low-energy QCD are manifested in their most unambiguous form in the light pseudoscalar mesons sector. Understanding the electromagnetic properties of these mesons are, therefore, crucial for probing QCD at the confinement scale. The study of two-photon decay widths of the p0, h, and h are of fundamental importance in determining mixing effects among the mesons and in obtaining the light-quark mass ratios. The PrimEx collaboration at Jefferson Lab has a comprehensive program to perform a high precision measurement of the p0 gg decay width via the Primakoff effect. With the planned 11 GeV upgrade of CEBAF, the current program will be extended to include the h and h mesons.

PACS numbers: 11.30.Rd, 12.38.Aw, 12.39.Fe, 13.20.-v
UDC 539.12

Keywords: low-energy QCD, chiral symmetry, light pseudoscalar mesons, Primakoff effect

Copyright by The Croatian Physical Society
For problems or questions please contact fizika@fizika.hfd.hr