Discrete quark-lepton symmetry need not pose a cosmological domain wall problem

Journal Article · Mon Feb 15 00:00:00 EST 1993 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.47.1356· OSTI ID:6993589

Lew, H ^[1]; Volkas, R R ^[2]

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1. Physics Department, Purdue University, West Lafayette, Indiana 47907-1396 (United States)
2. Research Centre for High Energy Physics, School of Physics, University of Melbourne, Parkville 3052 (Australia)

Quarks and leptons may be related to each other through a spontaneously broken discrete symmetry. Models with acceptable and interesting collider phenomenology have been constructed which incorporate this idea. However, the standard hot big bang model of cosmology is generally considered to eschew spontaneously broken discrete symmetries because they often lead to the formation of unacceptably massive domain walls. We point out that there are a number of plausible quark-lepton-symmetric models which do [ital not] produce cosmologically troublesome domain walls. We also raise what we think are some interesting questions concerning anomalous discrete symmetries.

• OSTI ID: 6993589
• Journal Information: Physical Review, D (Particles Fields); (United States), Vol. 47:4; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Pa
COSMOLOGY
DOMAIN STRUCTURE
LEPTONS
QUARKS
COLOR MODEL
GRAND UNIFIED THEORY
STANDARD MODEL
SYMMETRY BREAKING
COMPOSITE MODELS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
MATHEMATICAL MODELS
PARTICLE MODELS
POSTULATED PARTICLES
QUARK MODEL
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES
662120* - General Theory of Particles & Fields- Symmetry
Conservation Laws
Currents & Their Properties- (1992-)
662210 - Specific Theories & Interaction Models
Particle Systematics- Unified Theories & Models- (1992-)