pith. sign in

arxiv: 0905.0122 · v2 · submitted 2009-05-01 · ✦ hep-ph

Pion Electroproduction Amplitude Relations in the 1/N_c Expansion

classification ✦ hep-ph
keywords relationsamplitudeselectroproductionexpansionpionamplitudeavailableaway
0
0 comments X
read the original abstract

We derive expressions for pion electroproduction amplitudes in the 1/N_c expansion of QCD, and obtain from them linear relations between the electromagnetic multipole amplitudes that hold at all energies. The leading-order relations in 1/N_c compare favorably with available data (especially away from resonances), but the next-to-leading-order relations tend to provide only small or no improvement.

This paper has not been read by Pith yet.

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.