Artículos de revistas
Schwinger-Dyson approach and its application to generate a light composite scalar
Fecha
2016-03-10Registro en:
International Journal of Modern Physics A, v. 31, n. 7, 2016.
0217-751X
10.1142/S0217751X1650024X
2-s2.0-84959566065
Autor
DAFIS
Universidade Estadual Paulista (Unesp)
Universidade Federal do ABC (UFABC)
Institución
Resumen
We discuss the possibility of generating a light composite scalar boson, in a scenario that we may generically call Technicolor, or in any variation of a strongly interacting theory, where by light we mean a scalar composite mass about one order of magnitude below the characteristic scale of the strong theory. Instead of most of the studies about a composite Higgs boson, which are based on effective Lagrangians, we consider this problem in the framework of nonperturbative solutions of the fermionic Schwinger-Dyson and Bethe-Salpeter equations. We study a range of mechanisms proposed during the recent years to form such light composite boson, and verify that such possibility seems to be necessarily associated to a fermionic self-energy that decreases slowly with the momentum.