Fermions exoticos, novas dinamicas de sabor e o problema das familias
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Data
1995
Autores
Pisano, F [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
:Uma classe de extensões de gauge quirais do modelo standard com simetrias SU{3)c X SU{m)L X U{1)n, m = 3,4 é investigada. Embora estes modelos coincidam com o modelo standard a baixas energias, prevêm novas dinâmicas de sabor através de novos bosons de gauge da interação fraca e novos fermions. Dentro da mesma simetria de gauge os modelos diferem entre si pelo conteúdo de representação. Estudamos a dinâmica eletrofraca de cada modelo incluindo o mecanismo de Glashow-Iliopoulos-Maiani no setor de gauge e as correntes neutras que mudam sabor (FCNC) acopladas aos novos bosons de gauge. Física nova é prevista na escala de até 3 TeV. Demonstra-se como nesta classe de modelos emerge uma solução para o problema das famílias de fermions
We consider a class of chiral gauge extensions of the standard model with SU{3)c X SU{m)L X U{1)n, m = 3,4 gauge symmetries. Although at low energies these models coincide with the standard model they provide new flavor dynamics through new gauge bosons as well as new fermions. These models differ one from the other by the representation content, although they have the same gauge symmetry. We investigate the electroweak dynamics of each particular model including the Glashow-Iliopoulos-Maiani (GIM) mechanism and the flavor changing neutral currents (FCNC) coupled with the new neutral gauge bosons. New physics is predicted at an energy scale around or below 3 TeV. We also show that there is an interesting way for solving the flavor question within the framework of these models
We consider a class of chiral gauge extensions of the standard model with SU{3)c X SU{m)L X U{1)n, m = 3,4 gauge symmetries. Although at low energies these models coincide with the standard model they provide new flavor dynamics through new gauge bosons as well as new fermions. These models differ one from the other by the representation content, although they have the same gauge symmetry. We investigate the electroweak dynamics of each particular model including the Glashow-Iliopoulos-Maiani (GIM) mechanism and the flavor changing neutral currents (FCNC) coupled with the new neutral gauge bosons. New physics is predicted at an energy scale around or below 3 TeV. We also show that there is an interesting way for solving the flavor question within the framework of these models
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Palavras-chave
Fermions, Gauge, Bosons de
Como citar
PISANO, F. Fermions exoticos, novas dinamicas de sabor e o problema das familias. 1995. 93f. Tese (doutorado) - Universidade Estadual Paulista Júlio de Mesquita Filho, Instituto de Fisica Teorica., 1995.