https://doi.org/10.1140/epjp/i2017-11565-x
Regular Article
Lagrangian for massless gravitational field in de Sitter space
Department of Physics, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
* e-mail: sajadparsamehr@iauksh.ac.ir
Received:
8
March
2017
Accepted:
20
May
2017
Published online:
30
June
2017
Local or gauge symmetries are fundamental in elementary-particle physics to describes electroweak and strong interactions in the standard model. The gauge symmetry underlies the dynamics and is employed to describe the interaction between fields. For obtaining a gauge-invariant Lagrangian, the gauge-covariant derivative is defined such that any gauge fields are associated with the generators of the local symmetry group. In this paper, we obtain the gauge-covariant derivative and the gauge-invariant Lagrangian density in de Sitter ambient space formalism.
© Società Italiana di Fisica and Springer-Verlag GmbH Germany, 2017
