Regular Article – Theoretical Physics
Thick brane structures in generalized hybrid metric-Palatini gravity
Institute of Physics, University of Tartu, W. Ostwaldi 1, 50411, Tartu, Estonia
2 Unidade Acadêmica de Física, Universidade Federal de Campina Grande, 58429-900, Campina Grande, PB, Brazil
3 Departamento de Física, Universidade Federal da Paraíba, 58051-970, João Pessoa, PB, Brazil
4 Instituto de Astrofísica e Ciências do Espaço, Faculdade de Ciências da Universidade de Lisboa, Edifício C8, Campo Grande, P-1749-016, Lisbon, Portugal
Accepted: 2 January 2021
Published online: 13 January 2021
In this work, we study 5-dimensional braneworld scenarios in the scalar-tensor representation of the generalized hybrid metric-Palatini gravitational theory. We start by considering a model for a brane supported purely by the gravitational scalar fields of the theory and then consider other distinct cases where the models are also supported by an additional matter scalar field. We investigate the stability of the gravity sector and show that the models are all robust against small fluctuations of the metric. In particular, in the presence of the additional scalar field, we find that the profile of the gravitational zero mode may be controlled by the parameters of the model, being also capable of developing internal structure.
© The Author(s) 2021
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