Nonsymmetric tensor description of massive spin-2 particles in a curved background

Autor(es)

Dalmazi, D. ; Fortes, H. G. M.

• Tipo de documento: Artigo Científico
• Fonte: PHYSICAL REVIEW D; v. 95, n. 6, p. 13-pg., 2017-03-30.

Resumo

Massive spin-2 particles have been a subject of great interest in current research. If the graviton has a small mass, the gravitational force at large distances decreases more rapidly, which could contribute to the explanation of the accelerated expansion of the Universe. The massive spin-2 particles are commonly described by the known Fierz-Pauli action which is formulated in terms of a symmetric tensor h(mu nu) = h(nu mu). However, the Fierz-Pauli theory is not the only possible description of massive spin-2 particles via a rank-2 tensor. There are other two families of models L(a(1)) and L-nFP(c), where a(1) and c are real arbitrary parameters, which describe massive particles of spin-2 in the flat space via a nonsymmetric tensor e(mu nu) not equal e(nu mu). In the present work we derive Lagrangian constraints stemming from L(a(1)) and L-nFP(c) in curved backgrounds with nonminimal couplings which are analytic functions of m(2). We show that the constraints lead to a correct counting of degrees of freedom if nonminimal terms are included with fine-tuned coefficients and the background space is of the Einstein type, very much like the Fierz-Pauli case. We also examine the existence of local symmetries. (AU)

• Processo FAPESP: 13/25368-0 - Partículas massivas de spin-2 em espaços curvos de fundo
• Beneficiário: Hemily Gomes Marciano Fortes
• Modalidade de apoio: Bolsas no Brasil - Doutorado