Vacuum structure in the quantum nonlinear. sigma. -model

Journal Article · Sat Dec 14 00:00:00 EST 1991 · Modern Physics Letters A; (United States)

DOI:https://doi.org/10.1142/S0217732391004048· OSTI ID:5692753

Asano, H ^[1]; Kanada, H; So, H ^[2]

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1. Graduate School of Science and Technology, Niigata Univ., Niigata 950-21 (JP)
2. Dept. of Physics, Niigata Univ., Niigata 950-21 (JP)

In this paper the vacuum structure with a non-trivial winding number (the baryon number) of a quantum nonlinear {sigma}-model is investigated. Some falling paths to the vacuum are found in a finite-dimensional subspace of the infinite-dimensional configuration space. It is also shown by numerical calculation that the anti-baryon density is appeared in the outer region on the way of some paths falling into the vacuum. In addition, we also discuss some configurations without hedgehog ansatz.

• OSTI ID: 5692753
• Journal Information: Modern Physics Letters A; (United States), Vol. 6:38; ISSN 0217-7323
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
SIGMA MODEL
VACUUM STATES
ANTIBARYONS
BARYON NUMBER
NONLINEAR PROBLEMS
QUANTUM FIELD THEORY
ANTIMATTER
ANTIPARTICLES
BARYONS
BOSON-EXCHANGE MODELS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
HADRONS
MATHEMATICAL MODELS
MATTER
PARTICLE MODELS
PERIPHERAL MODELS
662110* - General Theory of Particles & Fields- Theory of Fields & Strings- (1992-)