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- Title
CONSTRAINTS ON THE HYPERON-SIGMA MESON COUPLING BY GW OBSERVATIONS.
- Authors
MARRANGHELLO, GUILHERME F.; RAZEIRA, MOISÉS; BODMANN, BARDO; DE ARAUJO, JOSÉ C. N.
- Abstract
The next generation of gravitational wave observatories are promissing candidates to make the first detections. Once the detection occurs the GW characteristics permit to extract some information about the gravitational wave source. In the present work we focus on waves produced by neutron stars which can give stringent constraints on the nuclear matter equation of state. The microscopic description is based on a nonlinear field-theoretical model in order to construct such an equation of state. The model has free parameters, which from actual knowledge may not be pinned down by direct nuclear matter experiments. An important example is the hyperon-sigma meson coupling constant, currently determined by the spin-isospin SU(6) scheme. The coupling constant is of significant relevance for the structure of the equation of state, controlling its rigidity and, consequently, the properties of neutron stars and gravitational wave signals. We show, in this work, how one can constrain the hyperon-sigma meson coupling constant assuming the detection of a gravitational wave.
- Subjects
PARTICLES (Nuclear physics); CONSTRAINTS (Physics); NEUTRON stars; GRAVITY waves; NUCLEAR physics; HYPERONS; BARYONS
- Publication
International Journal of Modern Physics E: Nuclear Physics, 2007, Vol 16, Issue 9, p2847
- ISSN
0218-3013
- Publication type
Article
- DOI
10.1142/S0218301307008550