https://doi.org/10.1140/epjc/s10052-015-3426-5
Regular Article - Theoretical Physics
Cosmological birefringence due to CPT-even Chern–Simons-like term with Kalb–Ramond and scalar fields
1
Institute of Physics, National Chiao Tung University, Hsinchu, 300, Taiwan
2
Division of Human Support System, Faculty of Symbiotic Systems Science, Fukushima University, Fukushima, 960-1296, Japan
3
Department of Physics, National Tsing Hua University, Hsinchu, 300, Taiwan
* e-mail: gore@mail.nctu.edu.tw
Received:
4
December
2014
Accepted:
21
April
2015
Published online:
5
May
2015
We study the CPT-even dimension-six Chern–Simons-like term by including dynamical Kalb–Ramond and scalar fields to examine the cosmological birefringence. We show that the combined effect of a neutrino current and a Kalb–Ramond field could induce a sizable rotation polarization angle in the cosmic microwave background radiation polarization.
© SIF and Springer-Verlag Berlin Heidelberg, 2015