2026-06-29T17:05:45Zhttps://docta.ucm.es/rest/oai/requestoai:docta.ucm.es:20.500.14352/587532023-08-25T22:18:46Zcom_20.500.14352_14col_20.500.14352_15
On the large Nf limit of chiral perturbation-theory
Dobado González, Antonio
Peláez Sagredo, José Ramón
53
Ymmetry-Breaking Sector
Weak-Interactions
Standard Model
Ww Scattering
Lagrangians
Higgs
Mass
Resonances
Energies
Matrix
Física (Física)
22 Física
In this letter we show how it is possible to obtain the large N(f) limit of chiral perturbation theory (chi-PT) in the chiral limit. In particular, we compute explicitly the Nambu-Goldstone boson (NGB) elastic scattering amplitude to leading order in 1/N (N being the number of NGB fields) to all powers in the external momenta. This amplitude is unitary to order 1/N and it can incorporate resonant behavior. The price to pay is the introduction of an infinite set of renormalized coupling constants that can be summarized in a single generating function. Playing with these constants, it is possible to simulate the linear sigma model and many others in the same large N limit.
Depto. de Física Teórica
Fac. de Ciencias Físicas
TRUE
pub
2023-06-20T18:50:40Z
2023-06-20T18:50:40Z
1992-07-23
journal article
https://hdl.handle.net/20.500.14352/58753
0370-2693
10.1016/0370-2693(92)90171-Y
metadata only access
Elsevier Science BV