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Titolo:
KAON ZERO-POINT FLUCTUATIONS IN NEUTRON-STAR MATTER
Autore:
THORSSON V; ELLIS PJ;
Indirizzi:
NORDITA,BLEGDAMSVEJ 17 DK-2100 COPENHAGEN O DENMARK UNIV WASHINGTON,DEPT PHYS SEATTLE WA 98195 UNIV MINNESOTA,SCH PHYS & ASTRON MINNEAPOLIS MN 55455
Titolo Testata:
Physical review. D. Particles and fields
fascicolo: 8, volume: 55, anno: 1997,
pagine: 5177 - 5192
SICI:
0556-2821(1997)55:8<5177:KZFINM>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
CHIRAL PERTURBATION-THEORY; NUCLEAR INTERACTIONS; BLACK-HOLES; CONDENSATION; MASS; LAGRANGIANS; COLLISIONS; EQUATION; QUARK;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
52
Recensione:
Indirizzi per estratti:
Citazione:
V. Thorsson e P.J. Ellis, "KAON ZERO-POINT FLUCTUATIONS IN NEUTRON-STAR MATTER", Physical review. D. Particles and fields, 55(8), 1997, pp. 5177-5192

Abstract

We investigate the contribution of zero-point motion, arising from fluctuations in kaon modes, to the ground state properties of neutron star matter containing a Bose condensate of kaons. The zero-point energyis derived via the thermodynamic partition function, by integrating out fluctuations for an arbitrary value of the condensate field. It is shown that the vacuum counterterms of the chiral Lagrangian ensure thecancellation of divergences dependent on mu, the charge chemical potential, which may be regarded as an external vector potential. The total grand potential, consisting of the tree-level potential, the zero-point contribution, and the counterterm potential, is extremized to yield a locally charge neutral, beta-equilibrated and minimum energy ground state. In some regions of parameter space we encounter the well-known problem of a complex effective potential. Where the potential is real and solutions can be obtained, the contributions from fluctuations are found to be small in comparison with tree-level contributions.

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Documento generato il 02/12/20 alle ore 08:14:32