On the large Nf limit of chiral perturbation-theory



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Dobado González, Antonio and Peláez Sagredo, José Ramón (1992) On the large Nf limit of chiral perturbation-theory. Physics Letters B, 286 (01/02/2013). pp. 136-146. ISSN 0370-2693

Official URL: http://dx.doi.org/10.1016/0370-2693(92)90171-Y


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.

Item Type:Article
Uncontrolled Keywords:Ymmetry-Breaking Sector, Weak-Interactions, Standard Model, Ww Scattering, Lagrangians, Higgs; Mass, Resonances, Energies, Matrix
Subjects:Sciences > Physics
ID Code:22867
Deposited On:19 Sep 2013 15:22
Last Modified:12 Nov 2014 13:02

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