https://doi.org/10.1140/epjc/s10052-014-2768-8
Regular Article - Theoretical Physics
‘Massless’ spin-
fields in the de Sitter space
1
Department of Physics, Sanandaj Branch, Islamic Azad University, Sanandaj, Iran
2
Department of Physics, Razi University, Kermanshah, Iran
* e-mail: aazizi@iausdj.ac.ir
** e-mail: alissr2010@gmail.com
Received:
4
July
2013
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
