Author:
Gong Jinn-Ouk,Mylova Maria,Sasaki Misao
Abstract
Abstract
We show that the general vacuum states that respect the de Sitter symmetry, known as the α-vacua, can introduce non-vanishing parity-violating tensor non-Gaussianities. This is due to the mixing by the Bogoliubov transformation of the positive and negative frequency modes of the Bunch-Davies vacuum. We calculate explicitly the bispectra of tensor perturbations and show that the amplitude can be exponentially enhanced for certain choices of the squeezing parameter α and the phase ϕ of the α-vacua. We find a new shape for the parity-violating tensor bispectrum which peaks in the flattened configuration.
Publisher
Springer Science and Business Media LLC
Subject
Nuclear and High Energy Physics
Reference65 articles.
1. T.D. Lee and C.-N. Yang, Question of Parity Conservation in Weak Interactions, Phys. Rev. 104 (1956) 254 [INSPIRE].
2. C.S. Wu et al., Experimental Test of Parity Conservation in β Decay, Phys. Rev. 105 (1957) 1413 [INSPIRE].
3. A.D. Sakharov, Violation of CP Invariance, C asymmetry, and baryon asymmetry of the universe, Pisma Zh. Eksp. Teor. Fiz. 5 (1967) 32 [INSPIRE].
4. W.-T. Ni, Equivalence Principles and Electromagnetism, Phys. Rev. Lett. 38 (1977) 301 [INSPIRE].
5. S.M. Carroll, G.B. Field and R. Jackiw, Limits on a Lorentz and Parity Violating Modification of Electrodynamics, Phys. Rev. D 41 (1990) 1231 [INSPIRE].
Cited by
4 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献