HAL : in2p3-00270890, version 1

arXiv : 0803.3968

Code Bibliographique ADS : 2008PhRvD..78b3521R

DOI : 10.1103/PhysRevD.78.023521

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Physical Review D 78 (2008) 023521

Statistical mechanics of strings with Y-junctions

R.J. Rivers, D.A. Steer1, 2

(2008)

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.

1 :	APC - AstroParticule et Cosmologie
2 :	CERN - European Organization for Nuclear Research

équipe(s) de recherche : APC - THEORIE

Thème(s)

:

Physique/Physique des Hautes Energies - Théorie Physique/Astrophysique/Phénomènes cosmiques de haute energie Planète et Univers/Astrophysique/Phénomènes cosmiques de haute energie

Mot(s)-clé(s) : Particle-theory and field-theory models of the early Universe

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Contributeur : Simone Lantz <>

Soumis le : Lundi 7 Avril 2008, 17:17:38

Dernière modification le : Vendredi 22 Juin 2012, 22:22:39