Baryogenesis in a baryon-symmetric universe

Journal Article · Sun Jul 15 00:00:00 EDT 1990 · Physical Review, D (Particles Fields); (USA)

DOI:https://doi.org/10.1103/PhysRevD.42.326· OSTI ID:6709403

Dodelson, S ^[1]; Widrow, L M ^[2]

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1. Gordon McKay Laboratory, Harvard University Cambridge, Massachusetts 02138 (USA)
2. Department of Physics, Harvard University, Cambridge, MA (USA) Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA (USA)

Baryon number is conserved in all interactions probed by present-day experiments. If baryon number is strictly conserved then currently popular scenarios for baryogenesis will have to be reexamined. We discuss a new paradigm for baryogenesis in which the fundamental Lagrangian is baryon conserving (invariant under U(1){sub {ital B}}). At high temperatures, U(1){sub {ital B}} is spontaneously broken and an excess of quarks over antiquarks of 10{sup {minus}10}{ital s}({ital s}==entropy density) is produced. Today, U(1){sub {ital B}} is restored. The most striking consequence of our assumptions is that the baryon number of the Universe is constant. During spontaneous symmetry breaking, the excess of baryons over antibaryons in the quark fields is exactly compensated by antibaryons hidden in the vacuum. Today, antibaryons appear either as massive U(1){sub {ital B}} charged scalar particles or as stable, nontopological bubbles of antimatter. One intriguing possibility suggested by our scenario is that the dark matter may be antimatter.

• DOE Contract Number: FG02-84ER40158
• OSTI ID: 6709403
• Journal Information: Physical Review, D (Particles Fields); (USA), Journal Name: Physical Review, D (Particles Fields); (USA) Vol. 42:2; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

640106* -- Astrophysics & Cosmology-- Cosmology
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BARYON NUMBER
CP INVARIANCE
ELEMENTARY PARTICLES
ENTROPY
FERMIONS
FIELD THEORIES
FUNCTIONS
GALAXIES
GRAND UNIFIED THEORY
INVARIANCE PRINCIPLES
LAGRANGIAN FUNCTION
LIE GROUPS
MATHEMATICAL MODELS
NONLUMINOUS MATTER
PARTICLE MODELS
PHYSICAL PROPERTIES
POSTULATED PARTICLES
QUANTUM FIELD THEORY
QUARKS
SCALAR FIELDS
SYMMETRY BREAKING
SYMMETRY GROUPS
THERMODYNAMIC PROPERTIES
U GROUPS
U-1 GROUPS
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES
UNIVERSE