Leptogenesis and primordial magnetic fields

Andrew J. Long; Eray Sabancilar; Tanmay Vachaspati

doi:10.1088/1475-7516/2014/02/036

Leptogenesis and primordial magnetic fields

Andrew J. Long, Eray Sabancilar, Tanmay Vachaspati

Research output: Contribution to journal › Article › peer-review

44 Scopus citations

Abstract

The anomalous conversion of leptons into baryons during leptogenesis is shown to produce a right-handed helical magnetic field; in contrast, the magnetic field produced during electroweak baryogenesis is known to be left-handed. If the cosmological medium is turbulent, the magnetic field evolves to have a present day coherence scale ∼ 10 pc and field strength ∼ 10^-18 Gauss. This result is insensitive to the energy scale at which leptogenesis took place. Observations of the amplitude, coherence scale, and helicity of the intergalactic magnetic field promise to provide a powerful probe of physics beyond the Standard Model and the very early universe.

Original language	English (US)
Article number	036
Journal	Journal of Cosmology and Astroparticle Physics
Volume	2014
Issue number	2
DOIs	https://doi.org/10.1088/1475-7516/2014/02/036
State	Published - Feb 2014

Keywords

cosmic magnetic fields theory
leptogenesis
particle physics - cosmology connection
physics of the early universe

ASJC Scopus subject areas

Astronomy and Astrophysics

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10.1088/1475-7516/2014/02/036

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title = "Leptogenesis and primordial magnetic fields",

abstract = "The anomalous conversion of leptons into baryons during leptogenesis is shown to produce a right-handed helical magnetic field; in contrast, the magnetic field produced during electroweak baryogenesis is known to be left-handed. If the cosmological medium is turbulent, the magnetic field evolves to have a present day coherence scale ∼ 10 pc and field strength ∼ 10-18 Gauss. This result is insensitive to the energy scale at which leptogenesis took place. Observations of the amplitude, coherence scale, and helicity of the intergalactic magnetic field promise to provide a powerful probe of physics beyond the Standard Model and the very early universe.",

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AB - The anomalous conversion of leptons into baryons during leptogenesis is shown to produce a right-handed helical magnetic field; in contrast, the magnetic field produced during electroweak baryogenesis is known to be left-handed. If the cosmological medium is turbulent, the magnetic field evolves to have a present day coherence scale ∼ 10 pc and field strength ∼ 10-18 Gauss. This result is insensitive to the energy scale at which leptogenesis took place. Observations of the amplitude, coherence scale, and helicity of the intergalactic magnetic field promise to provide a powerful probe of physics beyond the Standard Model and the very early universe.

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KW - leptogenesis

KW - particle physics - cosmology connection

KW - physics of the early universe

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Leptogenesis and primordial magnetic fields

Abstract

Keywords

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