Kaons and antikaons in asymmetric nuclear matter

Journal Article · Fri Aug 15 04:00:00 EDT 2008 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.78.024901· OSTI ID:21192126

Mishra, Amruta; Schramm, Stefan; Greiner, W ^[1]

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1. Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi-110 016 (India)

The properties of kaons and antikaons and their modifications in isospin asymmetric nuclear matter are investigated using a chiral SU(3) model. These isospin-dependent medium effects are important for asymmetric heavy-ion collision experiments and will be especially relevant for the neutron-rich heavy-ion collision experiments in the future accelerator facility GSI Facility for Antiproton and Ion Research (GSI-FAIR). In the present work, the medium modifications of the energies of the kaons and antikaons, within the asymmetric nuclear matter, arise because of the interactions of kaons and antikaons with the nucleons and scalar mesons. The values of the parameters in the model are obtained by fitting the saturation properties of nuclear matter and kaon-nucleon scattering lengths for I=0 and I=1 channels. Furthermore, the isovector and isoscalar pion-nucleon scattering lengths are calculated within the chiral effective model and compared with earlier results from the literature. The kaon-nucleon and pion-nucleon {sigma} coefficients are also calculated within the present chiral SU(3) model.

• OSTI ID: 21192126
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 2 Vol. 78; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANTIKAONS
ANTIPROTONS
ASYMMETRY
CHIRALITY
HEAVY ION REACTIONS
IONS
ISOSPIN
KAON-NUCLEON INTERACTIONS
KAONS
MODIFICATIONS
NEUTRONS
NUCLEAR MATTER
PION-NUCLEON INTERACTIONS
PIONS
SATURATION
SCALAR MESONS
SU-3 GROUPS