Axial coupling from matching constituent quark model to QCD

Abstract

The axial-vector coupling $g_A$ of a constituent quark is estimated from matching the constituent quark model to the operator product expansion in QCD in the limit of large number of colours under some assumptions. The obtained relation is $g_A\simeq \sqrt{7/11}\approx 0.80$, which is in agreement with the existing model estimates.

4 pages, accepted for publication as a Brief Report in Physical Review C

References in corpus (6)

• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• The Cosmological Parameters 2006
• The Extended Chiral Quark Model and QCD
• Constituent Quark Couplings and QCD in the Large $N_c$ Limit
• $N_c$-counting rules and the axial vector coupling constant of the constituent quark
• Vector mesons in the Extended Chiral Quark Model

Cited by in corpus (1)

• Holographic like models as a five-dimensional rewriting of large-Nc QCD