Strong CP violation, electroweak baryogenesis, and axionic dark matter

Journal Article · Wed Jan 15 04:00:00 EST 1992 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.45.466· OSTI ID:5081862

Kuzmin, V A; Shaposhnikov, M E; Tkachev, I I ^[1]

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1. Institute for Nuclear Research of the U.S.S.R. Academy of Sciences, 60th October Anniversary Propect 7a, 117312 Moscow (USSR)

We discuss the influence of strong {ital CP}-violating effects in invisible-axion models on electroweak baryogenesis. We find that they can be important only if the electroweak phase transition (EPT) occurs simultaneously with the chirality-breaking phase transition in QCD. The predicted baryon asymmetry of the Universe (BAU) might be of order of the observable one only if there is no entropy production in the EPT. At the same time the dark-matter constraints put a lower bound on the temperature after the EPT, so that it is impossible to satisfy simultaneously both requirements (BAU and axion dark matter). We conclude that possible strong {ital CP} violation plays no role in electroweak baryogenesis, unless there exists some yet unknown mechanism for the BAU generation, producing baryons at a rate which has to be at least 3 orders of magnitude higher than the sphaleron-induced rate. In this kind of hypothetical scenario there is a prediction of the axionic dark matter in the Universe from the very existence of the baryon excess while the dark-matter density is generally of order or greater than that of the observed baryonic matter.

• OSTI ID: 5081862
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 45:2; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662120* -- General Theory of Particles & Fields-- Symmetry
Conservation Laws
Currents & Their Properties-- (1992-)
662240 -- Models for Strong Interactions-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
AXIONS
BARYONS
BOSONS
CHIRAL SYMMETRY
CP INVARIANCE
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
GOLDSTONE BOSONS
HADRONS
HIGGS BOSONS
INVARIANCE PRINCIPLES
MATHEMATICAL MODELS
MATTER
NONLUMINOUS MATTER
PARTICLE MODELS
PHASE TRANSFORMATIONS
POSTULATED PARTICLES
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
STANDARD MODEL
SYMMETRY
SYMMETRY BREAKING
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES
UNIVERSE
WEINBERG-SALAM GAUGE MODEL