Published November 2003 | Version v1
Journal article Metadata-only

Strange hadronic matter with a weak Y-Y interaction

Creators

  • 1. Research Center of Nuclear Theory of National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000 (China)
  • 2. CCAST (World Laboratory), P.O. Box 8730, Beijing 100080 (China)
  • 3. Shanghai Institute of Nuclear Research, Chinese Academy of Sciences, P.O. Box 800204, Shanghai 201800 (China)
  • 4. Department of Physics, Fudan University, Shanghai 200433 (China)
  • 5. Department of Physics, Zhejiang University, Hangzhou 310028 (China)

Description

A modified quark meson coupling (MQMC) model is extended to include Λ hyperons and Ξ hyperons. The extended model is then used to study the equation of state (EOS) for strange hadronic matter. A weak Λ-Λ interaction deduced from recent observation of ΛΛ6He double hypernucleus is adopted in the calculation. The resultant EOS is compared with that deduced from a strong Λ-Λ interaction. It is found that while the system with the strong Λ-Λ interaction is more deeply bound than ordinary nuclear matter due to the opening of new degrees of freedom, the system with the weak Λ-Λ interaction is rather loosely bound compared to the latter. It is necessary to introduce the strange mesons σ * and φ in the MQMC model to properly describe the interaction between the hyperons in either strong or weak Λ-Λ interaction cases

Additional details

Identifiers

DOI
10.1103/PhysRevC.68.055201;

Publishing Information

Journal Title
Physical Review. C, Nuclear Physics
Journal Volume
68
Journal Issue
5
Journal Page Range
p. 055201-055201.6
ISSN
0556-2813
CODEN
PRVCAN

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
36023137
Subject category
S73: NUCLEAR PHYSICS AND RADIATION PHYSICS; S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Descriptors DEI
BARYON-BARYON INTERACTIONS; COMPARATIVE EVALUATIONS; COUPLING; DEGREES OF FREEDOM; EQUATIONS OF STATE; HYPERNUCLEI; LAMBDA BARYONS; NUCLEAR MATTER; QUANTUM FIELD THEORY; QUARK MODEL; STRANGE MESONS; XI BARYONS
Descriptors DEC
BARYONS; BOSONS; COMPOSITE MODELS; ELEMENTARY PARTICLES; EQUATIONS; EVALUATION; FERMIONS; FIELD THEORIES; HADRON-HADRON INTERACTIONS; HADRONS; HYPERONS; INTERACTIONS; MATHEMATICAL MODELS; MATTER; MESONS; NUCLEAR FRAGMENTS; NUCLEI; PARTICLE INTERACTIONS; PARTICLE MODELS; STRANGE PARTICLES

Optional Information

Notes
(c) 2003 The American Physical Society