Constraints on the electrical charge asymmetry of the universe
Open accessAbstract
We use the isotropy of the cosmic microwave background to place stringent constraints on a possible electrical charge asymmetry of the universe. We find the excess charge per baryon to be q e−p <10 −26 e in the case of a uniform distribution of charge, where e is the charge of the electron. If the charge asymmetry is inhomogeneous, the constraints will depend on the spectral index, n , of the induced magnetic field and range from q e−p <5 × 10 −20 e ( n = −2) to q e−p <2 × 10 −26 e ( ). If one could further assume that the charge asymmetries of individual particle species are not anti-correlated so as to cancel, this would imply, for photons, q γ <10 −35 e ; for neutrinos, q ν <4 × 10 −35 e ; and for heavy (light) dark matter particles q dm <4 × 10 −24 e ( q dm <4 × 10 −30 e ).
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A constraint on the parameter χ can be converted to a constraint on the charge difference between electrons and protons, the charge of neutrons and neutrinos, and the asymmetry of matter and anti-matter.
“Hence, a constraint on the parameter χ can be converted to a constraint on the charge difference between electrons and protons, the charge of neutrons and neutrinos, and the asymmetry of matter and anti-matter [29, 30, 37].”
From Electrodynamics on cosmological scales (2016) · cites this paper as [30]
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Electrodynamics on cosmological scales
Li, L.-X. (2016) · General Relativity and Gravitation · doi:10.1007/s10714-016-2028-3 · Cited by 5 · see citing works
- Authors
- Caprini, C., & Ferreira, P. G.
- Affiliations
- University of Geneva (CH)
- University of Oxford (GB)
- Venue
- Journal of Cosmology and Astroparticle Physics
- Publisher
- IOP Publishing
- Published
- 2005-02-18
- Volume
- 2005
- Issue
- 02
- Pages
- 006-006
- ISSN
- 1475-7508 (ISSN-L)
- 1475-7516
- OpenAlex
- W1976075072
- Cited by
- 60
- References
- 0
- Citations by year
- 2026: 3 · 2025: 3 · 2024: 8 · 2023: 2 · 2022: 4 · 2021: 3 · 2020: 2 · 2019: 3 · 2018: 1 · 2017: 1 · 2016: 2 · 2015: 1 · 2013: 1 · 2012: 1
- FWCI
- 2.52
- Type
- journal article
- Language
- en
- Open access
- green
- arxiv.org
- Locations
- Journal of Cosmology and Astroparticle Physics (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- CERN Document Server (European Organization for Nuclear Research) (submittedVersion)
- arXiv (Cornell University)
- Topics
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Cosmology and Gravitation Theories
- Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Dark Matter and Cosmic Phenomena
- Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Particle physics theoretical and experimental studies
- Keywords
- cosmic microwave background isotropy, induced magnetic field, spectral index, baryon charge, inhomogeneous charge distribution
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