Impacto
Downloads
Downloads per month over past year
Gómez Nicola, Ángel and Peláez Sagredo, José Ramón and Ruiz de Elvira, Jacobo (2010) Nonfactorization of four-quark condensates at low energies within chiral perturbation theory. Physical review D, 82 (7). ISSN 1550-7998
Preview |
PDF
285kB |
Official URL: http://dx.doi.org/10.1103/PhysRevD.82.074012
Abstract
Four-quark correlators and the factorization hypothesis are analyzed in the meson sector within chiral perturbation theory. We define the four-quark condensate as lim(x -> 0) < T((q) over barq)(x)((q) over barq)(0)>, which is equivalent to other definitions commonly used in the literature. Factorization of the four-quark condensate holds to leading and next to leading order. However, at next to next to leading order, a term with a nontrivial space-time dependence in the four-quark correlator yields a divergent four-quark condensate, whereas the two-quark condensate and the scalar susceptibility are finite. Such a nonfactorization term vanishes only in the chiral limit. We also comment on how factorization still holds in the large N-c limit, provided such a limit is taken before renormalization.
Item Type: | Article |
---|---|
Additional Information: | © 2010 The American Physical Society. |
Uncontrolled Keywords: | Strange quarks; Order P(6); One-loop; Qcd; Renormalization; Scattering; Chpt; Mass |
Subjects: | Sciences > Physics > Physics-Mathematical models Sciences > Physics > Mathematical physics |
ID Code: | 30222 |
Deposited On: | 21 May 2015 08:44 |
Last Modified: | 10 Dec 2018 15:09 |
Origin of downloads
Repository Staff Only: item control page