dorsal/arxiv
View SchemaForming Disoriented Chiral Condensates through Fluctuations
| Authors | Dirk H. Rischke |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9806045 |
| URL | https://arxiv.org/abs/nucl-th/9806045 |
| DOI | 10.1103/PhysRevC.58.2331 |
| Journal | Phys.Rev.C58:2331-2357,1998 |
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 = 160 MeV. It is shown that 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 restored in the initial stage of the system's evolution.
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"abstract": "Using the influence functional formalism, classical equations of motion for\nthe O(N) model are derived in the presence of a heat bath, in both the\nsymmetric phase as well as the phase of spontaneously broken symmetry. The heat\nbath leads to dissipation and fluctuation terms in the classical equations of\nmotion, which are explicitly computed to lowest order in perturbation theory.\nIn the broken phase these terms are found to be large for the sigma field, even\nat zero temperature, due to the decay process sigma -\u003e pi pi, while they are\nsmall for the pi fields at temperatures below T_c = 160 MeV. It is shown that\nin large volumes the presence of dissipation and fluctuations suppresses the\nformation of disoriented chiral condensates (DCC\u0027s). In small volumes, however,\nfluctuations become sufficiently large to induce the formation of DCC\u0027s even if\nchiral symmetry has not been restored in the initial stage of the system\u0027s\nevolution.",
"arxiv_id": "nucl-th/9806045",
"authors": [
"Dirk H. Rischke"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.58.2331",
"journal_ref": "Phys.Rev.C58:2331-2357,1998",
"title": "Forming Disoriented Chiral Condensates through Fluctuations",
"url": "https://arxiv.org/abs/nucl-th/9806045"
},
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