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Titolo:
FORMING DISORIENTED CHIRAL CONDENSATES THROUGH FLUCTUATIONS
Autore:
RISCHKE DH;
Indirizzi:
BROOKHAVEN NATL LAB,DEPT PHYS,RIKEN BNL RES CTR UPTON NY 11973
Titolo Testata:
Physical review. C. Nuclear physics
fascicolo: 4, volume: 58, anno: 1998,
pagine: 2331 - 2357
SICI:
0556-2813(1998)58:4<2331:FDCCTF>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
HIGH-ENERGY COLLISIONS; PHASE-TRANSITION; FINITE-TEMPERATURE; FIELD-THEORY; QCD; DISSIPATION; DYNAMICS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
36
Recensione:
Indirizzi per estratti:
Citazione:
D.H. Rischke, "FORMING DISORIENTED CHIRAL CONDENSATES THROUGH FLUCTUATIONS", Physical review. C. Nuclear physics, 58(4), 1998, pp. 2331-2357

Abstract

Using the influence functional formalism, classical equations of motion for the O(N) model are derived in the presence of a heat bath, in both the symmetric phase as well as the phase of spontaneously broken symmetry. The heat bath leads to dissipation and fluctuation terms in the classical equations of motion, which are explicitly computed to lowest order in perturbation theory. In the broken phase these terms are found to be large for the sigma field, even at zero temperature, due to the decay process sigma-->pi pi, while they are small for the pi fields at temperatures below T(c)similar or equal to 160 MeV. It is shownthat in large Volumes the presence of dissipation and fluctuations suppresses the formation of disoriented chiral condensates (DCC's). In small volumes, however, fluctuations become sufficiently large to induce the formation of DCC's even if chiral symmetry has not been restoredin the initial stage of the system's evolution. [S0556-2813(98)02810-6].

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Documento generato il 04/07/20 alle ore 12:24:47