Cosmological birefringence due to CPT-even Chern–Simons-like term with Kalb–Ramond and scalar fields

The European Physical Journal C

C. Q. Geng¹  Kazuharu Bamba²  W. F. Kao³  Shih-Hao Ho³ 

[1] Department of Physics, National Tsing Hua University, 300, Hsinchu, Taiwan;Division of Human Support System, Faculty of Symbiotic Systems Science, Fukushima University, 960-1296, Fukushima, Japan;Department of Physics, National Tsing Hua University, 300, Hsinchu, Taiwan;Institute of Physics, National Chiao Tung University, 300, Hsinchu, Taiwan;

关键词: Scalar Field;    Wilkinson Microwave Anisotropy Probe;    Vacuum Expectation Value;    Popular Candidate;    Fermion Current;   

DOI  :  10.1140/epjc/s10052-015-3426-5

来源: Springer

【 摘 要 】

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.

【 授权许可】

CC BY