Schwinger-Dyson approach and its application to generate a light composite scalar

Autor(es)

Doff, A. ^[1] ; Natale, A. A. ^{[2, 3]}

Afiliação do(s) autor(es)

^[1] Univ Tecnol Fed Parana, UTFPR, DAFIS, Av Monteiro Lobato Km 04, BR-84016210 Ponta Grossa, PR - Brazil

^[2] Univ Fed ABC, Ctr Ciencias Nat & Humanas, BR-09210170 Santo Andre, SP - Brazil

^[3] Univ Estadual Paulista, Inst Fis Teor, Rua Dr Bento T Ferraz 271, Bloco 2, BR-01140070 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: International Journal of Modern Physics A; v. 31, n. 7 MAR 10 2016.
• Citações Web of Science: 4

Resumo

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. (AU)

• Processo FAPESP: 13/22079-8 - Física de partículas e campos: modelo padrão e suas extensões
• Beneficiário: Adriano Antonio Natale
• Modalidade de apoio: Auxílio à Pesquisa - Temático