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Title: Strangeness in hadronic stellar matter

Abstract

We examine the presence of strangeness-bearing components, hyperons and kaons, in dense neutron star matter. Calculations are performed using relativistic mean field models, in which both the baryon-baryon and kaon-baryon interactions are mediated by meson exchange. Results of kaon condensation are found to be qualitatively similar to previous work with chiral models, if compatibility of the kaon optical potentials is required. The presence of strangeness, be it in the form of hyperons or kaons, implies a reduction in the maximum mass and a relatively large number of protons, sufficient to allow rapid cooling to take place. The need to improve upon the poorly known couplings of the strange particles, which determine the composition and structure of neutron stars, is stressed. We also discuss generic problems with effective masses in mean field theories.

Authors:
;  [1];  [2]
  1. Physics Department, SUNY at Stony Brook, Stony Brook, New York 11794 (United States)
  2. School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455 (United States)
Publication Date:
Research Org.:
University of Minnesota
OSTI Identifier:
132968
DOE Contract Number:  
FG02-87ER40328; FG02-88ER40388
Resource Type:
Journal Article
Journal Name:
Physical Review, C
Additional Journal Information:
Journal Volume: 52; Journal Issue: 6; Other Information: PBD: Dec 1995
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; NEUTRON STARS; STRANGENESS; BARYON-BARYON INTERACTIONS; CONDENSATES; EXCHANGE INTERACTIONS; HADRONS; HYPERONS; KAON REACTIONS; KAONS; MEAN-FIELD THEORY; MESONS; OPTICAL MODELS

Citation Formats

Knorren, R., Prakash, M., and Ellis, P.J. Strangeness in hadronic stellar matter. United States: N. p., 1995. Web. doi:10.1103/PhysRevC.52.3470.
Knorren, R., Prakash, M., & Ellis, P.J. Strangeness in hadronic stellar matter. United States. doi:10.1103/PhysRevC.52.3470.
Knorren, R., Prakash, M., and Ellis, P.J. Fri . "Strangeness in hadronic stellar matter". United States. doi:10.1103/PhysRevC.52.3470.
@article{osti_132968,
title = {Strangeness in hadronic stellar matter},
author = {Knorren, R. and Prakash, M. and Ellis, P.J.},
abstractNote = {We examine the presence of strangeness-bearing components, hyperons and kaons, in dense neutron star matter. Calculations are performed using relativistic mean field models, in which both the baryon-baryon and kaon-baryon interactions are mediated by meson exchange. Results of kaon condensation are found to be qualitatively similar to previous work with chiral models, if compatibility of the kaon optical potentials is required. The presence of strangeness, be it in the form of hyperons or kaons, implies a reduction in the maximum mass and a relatively large number of protons, sufficient to allow rapid cooling to take place. The need to improve upon the poorly known couplings of the strange particles, which determine the composition and structure of neutron stars, is stressed. We also discuss generic problems with effective masses in mean field theories.},
doi = {10.1103/PhysRevC.52.3470},
journal = {Physical Review, C},
number = 6,
volume = 52,
place = {United States},
year = {1995},
month = {12}
}