Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8185937 | Nuclear Physics B - Proceedings Supplements | 2010 | 4 Pages |
Abstract
Using the Resonance Chiral Theory lagrangian, we perform a calculation of the vector form factor of the pion at the next-to-leading order (NLO) in the 1/NC expansion. Imposing the correct QCD short-distance constraints, one determines it in terms of F, GV, FA and resonance masses. Its low momentum expansion fixes then the low-energy chiral couplings L9 and C88 âC90 at NLO, keeping full control of their renormalization scale dependence. At μ0 = 0.77 GeV, we obtain Lr9(μ0) = (7.6 ± 0.6) â
10â3 and Cr88(μ0) âCr90(μ0) = (â4.5 ± 0.5) â
10â5.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
Ignasi Rosell,