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Titolo:
Strange-quark matter within the Nambu-Jona-Lasinio model
Autore:
Mishustin, IN; Satarov, LM; Stocker, H; Greiner, W;
Indirizzi:
Russian Res Ctr, Kurchatov Inst, Moscow 123182, Russia Russian Res Ctr Moscow Russia 123182 rchatov Inst, Moscow 123182, Russia Univ Frankfurt, Inst Theoret Phys, D-60054 Frankfurt, Germany Univ Frankfurt Frankfurt Germany D-60054 hys, D-60054 Frankfurt, Germany Niels Bohr Inst, DK-2100 Copenhagen, Denmark Niels Bohr Inst Copenhagen Denmark DK-2100 , DK-2100 Copenhagen, Denmark
Titolo Testata:
PHYSICS OF ATOMIC NUCLEI
fascicolo: 5, volume: 64, anno: 2001,
pagine: 802 - 811
SICI:
1063-7788(200105)64:5<802:SMWTNM>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
HEAVY-ION COLLISIONS; PHASE-TRANSITION; FIELD-THEORY; SU(3) NAMBU; TEMPERATURE; STABILITY; DENSITY; RESTORATION; SEPARATION; DROPLETS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
36
Recensione:
Indirizzi per estratti:
Indirizzo: Mishustin, IN Russian Res Ctr, Kurchatov Inst, Pl Kurchatova 1, Moscow 123182, Russia Russian Res Ctr Pl Kurchatova 1 Moscow Russia 123182 Russia
Citazione:
I.N. Mishustin et al., "Strange-quark matter within the Nambu-Jona-Lasinio model", PHYS ATOM N, 64(5), 2001, pp. 802-811

Abstract

The equation of state of baryon-rich quark matter is studied within the SU(3) Nambu-Jona-Lasinio model with flavor-mixing interaction. Possible boundstates (strangelets) arid chiral phase transitions in this matter are investigated at various values of the strangeness fraction r(delta) model predictions are very sensitive to the ratio of the vector and scalar coupling constants, xi = G(V)/G(S), At xi = 0.5 and zero temperature, the binding energy takes a maximum value of about 15 MeV per baryon at r(delta) similar or equal to 0.4. Such strangelets are negatively charged arid have typical lifetimes of about 10(-7) s. Calculations are performed at finite temperaturesas well. According to these calculations, bound states exist up to temperatures of about 15 MeV. The model predicts a first-order chiral phase transition at finite baryon densities. The parameters of this phase transition are calculated as functions of r(delta). (C) 2001 MAIK "Nauka/Interperiodica".

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Documento generato il 02/04/20 alle ore 12:56:14