Mathematics – Logic
Scientific paper
Aug 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003basbr..23q..43v&link_type=abstract
Boletim da Sociedade Astronômica Brasileira (ISSN 0101-3440), vol.23, no.1, p.43-43
Mathematics
Logic
Scientific paper
The investigation of dense hadronic matter is one of the leading topics in nuclear and particle physics: it is hoped that from the behaviour of hadronic matter at increasing densities, - as realized in the collision of heavy ions at energies of 1 GeV/A or in the interior of stellar matter, at high densities such as the ones found in neutron stars, protoneutron stars and pulsars-, the unique property of Quantum Chromodynamics as a non-abelian gauge theory, i. e. confinement and its possible transition to a deconfined quark-gluon plasma at sufficiently high energies, can be studied in detail. One efficient approach to dense hadronic matter is based on Quantum Hadrodynamics. Within the framework of effective meson and baryon degrees of freedom the nuclear many-body problem is treated in a relativistic mean-field approach. In the study of dense hadronic matter in a generalized relativistic mean field approach, we confront results based on a multi-baryon lagrangian density which contains nonlinear couplings of the sigma, omega, rho and delta meson fields and compare its predictions with estimates obtained within a phenomenological naive dimensional analysis based on the naturalness of the various coupling constants of the theory. Upon adjusting the model parameters to describe bulk static properties of ordinary nuclear matter, we discuss implications of the approach for dense hadronic matter, in particular for neutron stars.
Dillig Manfred
Razeira M.
Vasconcellos Cesar A. Z.
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