Localização de modos fermiônicos em uma geometria de seis dimensões do tipo Conifold

• Ano de defesa: 2012
• Autor(a) principal: Dantas, Davi Monteiro
• Orientador(a): Almeida, Carlos Alberto Santos de
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Palavras-chave em Português: Mundo de brana; Férmions; Conifold; Braneworlds; Fermion localization
• Link de acesso: http://www.repositorio.ufc.br/handle/riufc/13704

One way to solve the hierarchy problem and therefore unify the fundamental forces is to assume, under the theoretical point of view, that our four-dimensional space (Brane) is housed in a space of higher dimensionality (Bulk). We call all that extra dimension which is not present in our Brana. The idea of extra dimensions to include unification of fundamental forces date from the 30s of last century, with the innovative proposal of Kaluza and Klein, and has been evolving ever since its formulation. Thus, other innovative proposals like that of the work of Randall and Sundrum have created new possibilities for the study, although it is curious that cite not have any experimental evidence to date that these dimensions exist. Fundamental fermionic particles have as one of its interesting properties the existence of left and right chiral modes, this information widely studied in the Standard Model and Supersymmetry in the call. In this article we treat on the location of the chiral modes, massless and massive, the fermionic fields of spin 1/2 in a six-dimensional space of type Conifold solved. This space has an adjustable parameter which allows to recover the geometry of other works of literature. Beyond this generalization was possible to find other interesting results as the thickening of the Brana and smoothing the model studied in 6D. Looking at work that the ratio of chiral modes is strictly dependent on the choice of coupling fields used. For free fermions chiral modes are identical. Regarding the location of Massive modes, we find that by rewriting the Dirac equation, obtained from our action, in a way kind of Schrödinger equation, we find a term potential. We found that when using the factors derived from the sixth dimension as a term coupling, we obtain results similar to a Yukawa coupling in five dimensions.