Recent developments in chiral perturbation theory
高能物理 - 唯象学
2007-05-23 v1
摘要
I briefly review the current status of chiral perturbation theory in the meson sector. Emphasis is given on the quest for higher precision. I discuss two examples: one where it is difficult to make a good prediction (K_L -> pi^0 gamma gamma), and where CHPT, even when pushed to higher orders, cannot yield an increase in accuracy. The second one is pi pi scattering where a very sharp prediction can be made by combining CHPT at the two-loop level with dispersion relations
引用
@article{arxiv.hep-ph/0011025,
title = {Recent developments in chiral perturbation theory},
author = {Gilberto Colangelo},
journal= {arXiv preprint arXiv:hep-ph/0011025},
year = {2007}
}
备注
Latex 12 pages, Invited plenary talk at "Confinement IV", 4-8 July, Vienna