Conference paper
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
Abstract
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 π 0 , η, and η ′ 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 π 0 → γγ decay width via the Primakoff effect. With the planned 11 GeV upgrade of CEBAF, the current program will be extended to include the η and η ′ mesons.
Keywords
low-energy QCD; chiral symmetry; light pseudoscalar mesons; Primakoff effect
Hrčak ID:
305713
URI
Publication date:
1.6.2004.
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