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Chiral gravitational waves from chiral fermions

Anber, Mohamed M.; Sabancilar, Eray

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Authors

Eray Sabancilar



Abstract

We report on a new mechanism that leads to the generation of primordial chiral gravitational waves, and hence, the violation of the parity symmetry in the Universe. We show that nonperturbative production of fermions with a definite helicity is accompanied by the generation of chiral gravitational waves. This is a generic and model-independent phenomenon that can occur during inflation, reheating and radiation eras, and can leave imprints in the cosmic microwave background polarization and may be observed in future ground- and space-based interferometers. We also discuss a specific model where chiral gravitational waves are generated via the production of light chiral fermions during pseudoscalar inflation.

Citation

Anber, M. M., & Sabancilar, E. (2017). Chiral gravitational waves from chiral fermions. Physical Review D, 96(2), Article 023501. https://doi.org/10.1103/physrevd.96.023501

Journal Article Type Article
Online Publication Date Jul 5, 2017
Publication Date Jul 15, 2017
Deposit Date Oct 3, 2021
Publicly Available Date Mar 28, 2024
Journal Physical Review D
Print ISSN 2470-0010
Electronic ISSN 2470-0029
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 96
Issue 2
Article Number 023501
DOI https://doi.org/10.1103/physrevd.96.023501

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Published Journal Article (210 Kb)
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Copyright Statement
Reprinted with permission from the American Physical Society: Anber, Mohamed M. & Sabancilar, Eray (2017). Chiral gravitational waves from chiral fermions. Physical Review D 96(2): 023501. © (2017) by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.





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