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Statistical mechanics of strings with Y-junctions
We investigate the Hagedorn transitions of string networks with Y-junctions as may occur, for example, with (p,q) cosmic superstrings. In a simplified model with three different types of string, the partition function reduces to three generalised coupled XY models. We calculate the phase diagram and...
Autores principales: | , |
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Lenguaje: | eng |
Publicado: |
2008
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1103/PhysRevD.78.023521 http://cds.cern.ch/record/1096345 |
_version_ | 1780913906046205952 |
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author | Rivers, R J Steer, D A |
author_facet | Rivers, R J Steer, D A |
author_sort | Rivers, R J |
collection | CERN |
description | We investigate the Hagedorn transitions of string networks with Y-junctions as may occur, for example, with (p,q) cosmic superstrings. In a simplified model with three different types of string, the partition function reduces to three generalised coupled XY models. We calculate the phase diagram and show that, as the system is heated, the lightest strings first undergo the Hagedorn transition despite the junctions. There is then a second, higher, critical temperature above which infinite strings of all tensions, and junctions, exist. Conversely, on cooling to low temperatures, only the lightest strings remain, but they collapse into small loops. |
id | cern-1096345 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2008 |
record_format | invenio |
spelling | cern-10963452019-09-30T06:29:59Zdoi:10.1103/PhysRevD.78.023521http://cds.cern.ch/record/1096345engRivers, R JSteer, D AStatistical mechanics of strings with Y-junctionsParticle Physics - TheoryWe investigate the Hagedorn transitions of string networks with Y-junctions as may occur, for example, with (p,q) cosmic superstrings. In a simplified model with three different types of string, the partition function reduces to three generalised coupled XY models. We calculate the phase diagram and show that, as the system is heated, the lightest strings first undergo the Hagedorn transition despite the junctions. There is then a second, higher, critical temperature above which infinite strings of all tensions, and junctions, exist. Conversely, on cooling to low temperatures, only the lightest strings remain, but they collapse into small loops.arXiv:0803.3968CERN-PH-TH-2008-056oai:cds.cern.ch:10963452008-03-28 |
spellingShingle | Particle Physics - Theory Rivers, R J Steer, D A Statistical mechanics of strings with Y-junctions |
title | Statistical mechanics of strings with Y-junctions |
title_full | Statistical mechanics of strings with Y-junctions |
title_fullStr | Statistical mechanics of strings with Y-junctions |
title_full_unstemmed | Statistical mechanics of strings with Y-junctions |
title_short | Statistical mechanics of strings with Y-junctions |
title_sort | statistical mechanics of strings with y-junctions |
topic | Particle Physics - Theory |
url | https://dx.doi.org/10.1103/PhysRevD.78.023521 http://cds.cern.ch/record/1096345 |
work_keys_str_mv | AT riversrj statisticalmechanicsofstringswithyjunctions AT steerda statisticalmechanicsofstringswithyjunctions |