Strange [ital s]-wave excitation of the Nambu--Jona-Lasinio soliton

Journal Article · Wed Jun 01 00:00:00 EDT 1994 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.49.5958· OSTI ID:7239066

Weigel, H; Alkofer, R; Reinhardt, H ^[1]

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1. Institute for Theoretical Physics, Tuebingen University, Auf der Morgenstelle 14, D-72076 Tuebingen (Germany)

The recently developed method to investigate mesonic fluctuations off the chiral soliton in the Nambu--Jona-Lasinio model is applied to kaons in the [ital S]-wave channel. It is shown that for commonly accepted choices of parameters the presence of the soliton and the lack of confinement in this model provide an unphysical (valence) quark threshold which is lower than the kaon mass. Choosing parameters such that this threshold is avoided, a bound state is obtained in the [ital S]-wave channel. After semiclassical quantization this state acquires the quantum numbers of an odd parity [Lambda] and is predicted at about 420 MeV above the nucleon mass.

• OSTI ID: 7239066
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 49:11; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
BOUND STATE
CHIRAL SYMMETRY
COMPOSITE MODELS
CONFINEMENT
ELEMENTARY PARTICLES
ENERGY-LEVEL TRANSITIONS
EXCITATION
FLUCTUATIONS
HADRONS
KAONS
MATHEMATICAL MODELS
MESONS
NUCLEON-NUCLEON POTENTIAL
PARTIAL WAVES
PARTICLE MODELS
POTENTIALS
PSEUDOSCALAR MESONS
QUANTIZATION
QUANTUM NUMBERS
QUARK MODEL
QUASI PARTICLES
S WAVES
SEMICLASSICAL APPROXIMATION
SKYRME POTENTIAL
SOLITONS
STRANGE MESONS
STRANGE PARTICLES
SYMMETRY
VARIATIONS