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Massive spin-2 particles in curved backgrounds

Grant number: 13/25368-0
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): March 01, 2014
Effective date (End): February 28, 2018
Field of knowledge:Physical Sciences and Mathematics - Physics - Elementary Particle Physics and Fields
Principal researcher:Denis Dalmazi
Grantee:Hemily Gomes Marciano Fortes
Home Institution: Faculdade de Engenharia (FEG). Universidade Estadual Paulista (UNESP). Campus de Guaratinguetá. Guaratinguetá , SP, Brazil

Abstract

We investigate the interaction of massive spin-2 particles with a gravitational background. Recently, we have obtained new models for massive spin-2 particles in four dimensions on flat space. Here we check the consistency of such models on curved spaces. Since the gravitational interaction is universal, if massive spin-2 particles do exist, they should couple consistently to the gravitational field. Due to the known difficulties in the quantization of the gravitational field, following the literature, we suppose that gravity is a background field (non-dynamic).By using the new spin-2 models we are able to check the universality (model independence) of the conclusions in the literature drawn solely from the Fierz-Pauli model which is a paradigm for massive spin-2 particles. The non-commuting covariant derivatives give rise to several problems like propagation of non-physical degrees of freedom, constraints on the background geometry, lack of unitarity and causality. Those aspects will be analyzed via equations of motion in curved space, Lagrangian constraints, massive deformation of gauge symmetries and Stueckelberg fields. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
DALMAZI, D.; FORTES, H. G. M. Nonsymmetric tensor description of massive spin-2 particles in a curved background. Physical Review D, v. 95, n. 6 MAR 30 2017. Web of Science Citations: 2.
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
FORTES, Hemily Gomes Marciano. Partículas massivas de spin-2 em espaços curvos de fundo. 2018. 55 f. Doctoral Thesis - Universidade Estadual Paulista "Júlio de Mesquita Filho" Faculdade de Engenharia (Campus de Guaratinguetá)..

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