TY  - JOUR
AU  - Pich, A.
AU  - Rosell, I.
AU  - Sanz-Cillero, J. J.
PY  - 2011
DA  - 2011//
TI  - The vector form factor at the next-to-leading order in 1/N-C: chiral couplings L-9(mu) and C-88(mu)-C-90(mu)
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 109
EP  - 23pp
VL  - 02
IS  - 2
PB  - Springer
KW  - 1/N Expansion
KW  - Chiral Lagrangians
KW  - QCD
AB  - 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/N-C expansion. Imposing the correct QCD short-distance constraints, one fixes the amplitude in terms of the pion decay constant F and resonance masses. Its low momentum expansion determines then the corresponding O(p(4)) and O(p(6)) low-energy chiral couplings at NLO, keeping control of their renormalization scale dependence. At mu(0) = 0.77 GeV, we obtain L-9(mu(0)) = (7.9 +/- 0.4).10(-3) and C-88(mu(0)) – C-90(mu(0)) = (-4.6 +/- 0.4).10(-5).
SN  - 1126-6708
UR  - http://arXiv.org/abs/arXiv:1011.5771
UR  - https://doi.org/10.1007/JHEP02(2011)109
DO  - 10.1007/JHEP02(2011)109
LA  - English
N1  - ISI:000287939200009
ID  - Pich_etal2011
ER  -