Baryon asymmetry from hypermagnetic helicity in dilaton hypercharge electromagnetism

Journal Article · Fri Dec 15 00:00:00 EST 2006 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.74.123504· OSTI ID:20868174

Bamba, Kazuharu ^[1]

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1. Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502 (Japan)

The generation of the baryon asymmetry of the Universe from the hypermagnetic helicity, the physical interpretation of which is given in terms of hypermagnetic knots, is studied in inflationary cosmology, taking into account the breaking of the conformal invariance of hypercharge electromagnetic fields through both a coupling with the dilaton and with a pseudoscalar field. It is shown that, if the electroweak phase transition is strongly first order and the present amplitude of the generated magnetic fields on the horizon scale is sufficiently large, a baryon asymmetry with a sufficient magnitude to account for the observed baryon-to-entropy ratio can be generated.

• OSTI ID: 20868174
• Journal Information: Physical Review. D, Particles Fields, Vol. 74, Issue 12; Other Information: DOI: 10.1103/PhysRevD.74.123504; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
ASYMMETRY
BARYONS
CONFORMAL INVARIANCE
COSMOLOGY
COUPLING
ELECTROMAGNETIC FIELDS
ELECTROMAGNETISM
ENTROPY
HELICITY
HYPERCHARGE
MAGNETIC FIELDS
PHASE TRANSFORMATIONS
UNIVERSE