Baryogenesis from cosmic strings at the electroweak scale

Journal Article · Sat Mar 01 04:00:00 EST 1997 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.55.3318· OSTI ID:517007

Dasgupta, I ^[1]

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1. Department of Physics, Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215 (United States)

We explore the viability of baryogenesis from light scalar decays after the electroweak phase transition. A minimal model of this kind is constructed with new CP-violating interactions involving a heavy fourth family. The departure from thermal equilibrium must come from topological defects such as cosmic strings, and we show that almost any mechanism for producing the cosmic strings at the electroweak scale results in a viable theory. Baryogenesis occurs in the fourth generation but the baryon number is later transported to the visible generations. This mechanism of indirect baryogenesis allows us to satisfy experimental limits on the proton lifetime while still having perturbative baryon number violation at low energies. The fourth family has very small mixing angles which opens the possibility of distinct observable signatures in collider experiments. {copyright} {ital 1997} {ital The American Physical Society}

• Research Organization: Boston University
• DOE Contract Number: FG02-91ER40676
• OSTI ID: 517007
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Journal Issue: 6 Vol. 55; ISSN 0556-2821; ISSN PRVDAQ
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BARYON NUMBER
CONFIGURATION MIXING
COSMOLOGY
CP INVARIANCE
DEFECTS
GRAND UNIFIED THEORY
LIFETIME
PHASE TRANSFORMATIONS
STRING MODELS
THERMAL EQUILIBRIUM
TOPOLOGY
VIOLATIONS