Gradient approach to the sphaleron barrier

Journal Article · Wed Mar 15 04:00:00 EST 1995 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.51.3061· OSTI ID:6547871

Nolte, G ^[1]; Kunz, J ^[2]

---

1. Fachbereich Physik, Universitaet Oldenburg, Postfach 2503, D-26111 Oldenburg (Germany)
2. Fachbereich Physik, Universitaet Oldenburg, Postfach 2503, D-26111 Oldenburg (Germany) Instituut voor Theoretische Fysica, Rijksuniversiteit te Utrecht, NL-3508 TA Utrecht (Netherlands)

We apply the gradient approach to obtain a path over the sphaleron barrier and to demonstrate the fermionic level crossing phenomenon. Neglecting the mixing angle dependence and assuming that the fermions of a doublet are degenerate in mass we employ spherically symmetric [ital Ansa]$[ital iuml---tze] for the fields. The gradient path over the barrier is smooth, even for large values of the Higgs boson mass or of the fermion mass, where the external energy path bifurcates.

• OSTI ID: 6547871
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 51:6; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662110* -- General Theory of Particles & Fields-- Theory of Fields & Strings-- (1992-)
662120 -- General Theory of Particles & Fields-- Symmetry
Conservation Laws
Currents & Their Properties-- (1992-)
662210 -- Specific Theories & Interaction Models
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYON NUMBER
ELEMENTARY PARTICLES
ENERGY
EQUATIONS
FERMIONS
FIELD EQUATIONS
FIELD THEORIES
HIGGS BOSONS
LEPTON NUMBER
MASS
MATHEMATICAL MODELS
MIXING
PARTICLE MODELS
POSTULATED PARTICLES
Pa
Particle Systematics-- Unified Theories & Models-- (1992-)
TUNNELING
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES
VACUUM STATES
VIOLATIONS
WEINBERG-SALAM GAUGE MODEL