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Titolo:
Classical pion fields in the presence of a source
Autore:
Ryskin, MG; Shuvaev, AG;
Indirizzi:
Russian Acad Sci, Petersburg Nucl Phys Inst, Gatchina 188350, Russia Russian Acad Sci Gatchina Russia 188350 ys Inst, Gatchina 188350, Russia
Titolo Testata:
PHYSICS OF ATOMIC NUCLEI
fascicolo: 8, volume: 64, anno: 2001,
pagine: 1508 - 1512
SICI:
1063-7788(200108)64:8<1508:CPFITP>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
DISORIENTED CHIRAL CONDENSATE; HEAVY-ION COLLISIONS; HIGH-ENERGY; NUCLEAR COLLISIONS; PHASE-TRANSITION; MATTER;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
23
Recensione:
Indirizzi per estratti:
Indirizzo: Ryskin, MG Russian Acad Sci, Petersburg Nucl Phys Inst, Gatchina 188350, Russia Russian Acad Sci Gatchina Russia 188350 tchina 188350, Russia
Citazione:
M.G. Ryskin e A.G. Shuvaev, "Classical pion fields in the presence of a source", PHYS ATOM N, 64(8), 2001, pp. 1508-1512

Abstract

A classical pion field that is similar to a disoriented chiral condensate is considered in the presence of an external source. The field is similar to the condensate in that the isotopic orientation of the field in the wholespace is determined by a single vector. Within the nonlinear sigma model, classical solutions are considered both iii the chiral limit, where the pions are massless, and in the case of a finite pion mass. In either case, theclassical filed is similar to the Coulomb field of a charged particle; however, the nonlinear pion interaction results in the existence of several solutions. In the massless case and in the case where the source is sufficiently small, there are a great number of classical solutions characterized byfinite discrete energies. In the more realistic case of heavy ions, there are no stable solutions of this type; however, long-lived quasistationary states, which slowly decay, emitting very soft pions, can be formed. Tile structure and the energies of these solutions are studied numerically. (C) 2001 MAIK "Nauka/interperiodica".

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Documento generato il 08/04/20 alle ore 07:32:59