dorsal/arxiv
View SchemaNonequilibrium Weak Processes in Kaon Condensation II - Kinetics of condensation ---
| Authors | Takumi Muto, Toshitaka Tatsumi, Naoki Iwamoto |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9909047 |
| URL | https://arxiv.org/abs/nucl-th/9909047 |
| DOI | 10.1103/PhysRevD.61.083002 |
| Journal | Phys.Rev. D61 (2000) 083002 |
Abstract
The kinetics of negatively charged kaon condensation in the early stages of a newly born neutron star is considered. The thermal kaon process, in which kaons are thermally produced by nucleon-nucleon collisions, is found to be dominant throughout the equilibration process. Temporal changes of the order parameter of the condensate and the number densities of the chemical species are obtained from the rate equations, which include the thermal kaon reactions as well as the kaon-induced Urca and the modified Urca reactions. It is shown that the dynamical evolution of the condensate is characterized by three stages: the first, prior to establishment of a condensate, the second, during the growth and subsequent saturation of the condensate, and the third, near chemical equilibrium. The connection between the existence of a soft kaon mode and the instability of the noncondensed state is discussed. Implications of the nonequilibrium process on the possible delayed collapse of a protoneutron star are also mentioned.
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"abstract": "The kinetics of negatively charged kaon condensation in the early stages of a\nnewly born neutron star is considered. The thermal kaon process, in which kaons\nare thermally produced by nucleon-nucleon collisions, is found to be dominant\nthroughout the equilibration process. Temporal changes of the order parameter\nof the condensate and the number densities of the chemical species are obtained\nfrom the rate equations, which include the thermal kaon reactions as well as\nthe kaon-induced Urca and the modified Urca reactions. It is shown that the\ndynamical evolution of the condensate is characterized by three stages: the\nfirst, prior to establishment of a condensate, the second, during the growth\nand subsequent saturation of the condensate, and the third, near chemical\nequilibrium. The connection between the existence of a soft kaon mode and the\ninstability of the noncondensed state is discussed. Implications of the\nnonequilibrium process on the possible delayed collapse of a protoneutron star\nare also mentioned.",
"arxiv_id": "nucl-th/9909047",
"authors": [
"Takumi Muto",
"Toshitaka Tatsumi",
"Naoki Iwamoto"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevD.61.083002",
"journal_ref": "Phys.Rev. D61 (2000) 083002",
"title": "Nonequilibrium Weak Processes in Kaon Condensation II - Kinetics of condensation ---",
"url": "https://arxiv.org/abs/nucl-th/9909047"
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