Quantum loops in the Resonance Chiral Theory: improving the vector form factor
High Energy Physics - Phenomenology
2009-11-11 v1
Abstract
Quantum loops in the Resonance Chiral Theory are needed to improve the implementation of non-perturbative QCD. Furthermore, the one-loop computations can predict chiral low-energy couplings at next-to-leading order, a very appealing task. We present a first calculation of the vector form factor of the pion at subleading order in the 1/N_C expansion. From the analysis of the result at large energies we justify the requirement of considering short-distance constraints from form factors with resonances in the final state. The long-distance limit of our results allows to get a next-to-leading order estimate of \ell_6.
Cite
@article{arxiv.hep-ph/0605329,
title = {Quantum loops in the Resonance Chiral Theory: improving the vector form factor},
author = {I. Rosell},
journal= {arXiv preprint arXiv:hep-ph/0605329},
year = {2009}
}
Comments
Talk given at the International Workshop e+e- Collisions from phi to J/psi, 27th February-2nd March (2006), Novosibirsk (Russia)