Regular Article - Theoretical Physics
‘Massless’ spin- fields in the de Sitter space
Department of Physics, Sanandaj Branch, Islamic Azad University, Sanandaj, Iran
2 Department of Physics, Razi University, Kermanshah, Iran
Accepted: 3 February 2014
Published online: 7 March 2014
In this paper, ‘massless’ spin- fields in the de Sitter space are considered. This work is a continuation of a previous paper devoted to the quantization of the de Sitter ‘massive’ spin- fields. Due to the appearance of gauge invariance and an indefinite metric, the covariant quantization of the ‘massless’ spin- fields requires an indecomposable representation of the de Sitter group. The gauge fixing corresponding to the simplest Gupta–Bleuler structure is used, and a gauge invariant field is discussed. The field equation is obtained by using the Casimir operator of the de Sitter group. The solutions are written in terms of the coordinate-independent de Sitter plane waves. Finally, the generalized two-point function is calculated.
© SIF and Springer-Verlag Berlin Heidelberg, 2014