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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...

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Detalles Bibliográficos
Autores principales: Rivers, R J, Steer, D A
Lenguaje:eng
Publicado: 2008
Materias:
Acceso en línea:https://dx.doi.org/10.1103/PhysRevD.78.023521
http://cds.cern.ch/record/1096345
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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.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2008
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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