Volume 141, Number 2, January 2023
|Number of page(s)||6|
|Section||Gravitation, cosmology and astrophysics|
|Published online||09 January 2023|
The bumblebee field excitations in a cosmological braneworld
1 Universidade Federal do Ceará (UFC), Departamento de Física - Campus do Pici, Fortaleza, CE, C.P. 6030, 60455-760, Brazil
2 Universidade Federal do Cariri (UFCA) - Av. Tenente Raimundo Rocha, Cidade Universitária, Juazeiro do Norte, Ceará, CEP 63048-080, Brazil
(a) E-mail: firstname.lastname@example.org (corresponding author)
Received: 20 September 2022
Accepted: 16 December 2022
We investigate the effects of the spacetime curvature and extra dimensions on the excitations of the Lorentz violating bumblebee field Bμ. By assuming the bumblebee field living in a five-dimensional AdS5 bulk, we found an exponential suppression of the bumblebee self-interacting constant λ and of the bumblebee vacuum expectation value (VEV) bM along the fifth extra dimension. The fluctuations of the bumblebee field upon the VEV can be decomposed into transverse and longitudinal modes with respect to bM. For a spacelike bM along the extra dimension and assuming a thin FRW 3-brane embedded in the AdS5, the transverse mode is localized on the brane. The bulk geometry leads to a propagating and unbound longitudinal mode along the extra dimension. On the brane, the cosmological expansion leads to the decay of the longitudinal mode in time, as Δt ≈ H−1.
© 2023 EPLA
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.