Folded supersymmetry as a candidate to solve the Hierarchy Problem of the Standard Model
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Data
2017-05-26
Autores
Choqque, Carlos Yosep Bautista [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
O problema da hierarquia no Modelo Padrão surge devido à presença de divergências quadráticas provenientes de correções quânticas ao parâmetro de massa do bóson de Higgs. O presente trabalho trata sobre um recurso conhecido como Supersimetria Dobrada (Folded Supersymmetry), que pode ser usado para construir extensões do Modelo Padrão que estejam livres dessas divergências. Dado que a contribuição do top quark é a mais significativa, este trabalho se propõe centralizar nele demonstrando que o cancelamento é possivel mediante um parceiro do top quark de spin oposto e carga de cor diferente ao da particula top. Deve-se notar a diferencia com as teorias supersimétricas, onde o parceiro, apesar de ter spin oposto, necessariamente possui a mesma carga de cor. Finalmente, construimos uma teoria com uma dimensãao espacial extra que serve como UV Completion para explicar a origem dos cancelamentos à energias maiores.
The hierarchy problem in the Standard Model arises due to the presence of quadratic divergences coming from loop corrections to the mass parameter of the Higgs boson. The present work reviews a tool known as Folded Supersymmetry that can be used to build Standard Model extensions which are free of those divergences. Since the top quark contribution is the most significant, this dissertation focuses on it showing that it is possible to cancel it out with a top quark partner with opposite spin-statistics and the same color charge as the top particle. We must note the difference with supersymmetric theories where the partner (superpartner), despite having opposite spin-statistics, necessarily has the same color charge. Finally, we construct a suitable UV completion in a 5-dimensional spacetime for the folded supersymmetric theory that explains the origin of the cancellations at higher energies.
The hierarchy problem in the Standard Model arises due to the presence of quadratic divergences coming from loop corrections to the mass parameter of the Higgs boson. The present work reviews a tool known as Folded Supersymmetry that can be used to build Standard Model extensions which are free of those divergences. Since the top quark contribution is the most significant, this dissertation focuses on it showing that it is possible to cancel it out with a top quark partner with opposite spin-statistics and the same color charge as the top particle. We must note the difference with supersymmetric theories where the partner (superpartner), despite having opposite spin-statistics, necessarily has the same color charge. Finally, we construct a suitable UV completion in a 5-dimensional spacetime for the folded supersymmetric theory that explains the origin of the cancellations at higher energies.
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Supersimetria dobrada, Supersimetria, Modelo padrão, Problema de hierarquia, Minimal Supersymmetric Standard Model, Dimensões extra, Folded Supersymmetry, Supersymmetry, Standard Model, Hierarchy problem, Extra dimensions