Nontopological finite temperature induced fermion number

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dc.contributor.authorAitchison, I. J. R.en
dc.contributor.authorDunne, Gerald Vincenten
dc.contributor.organisationSpecial Research Centre for the Subatomic Structure of Matteren
dc.contributor.schoolSchool of Chemistry and Physics : Physics and Mathematical Physicsen
dc.date.issued2001en
dc.description.abstractWe show that while the zero temperature induced fermion number in a chiral sigma model background depends only on the asymptotic values of the chiral field, at finite temperature the induced fermion number depends also on the detailed shape of the chiral background. We resum the leading low temperature terms to all orders in the derivative expansion, producing a simple result that can be interpreted physically as the different effect of the chiral background on virtual pairs of the Dirac sea and on the real particles of the thermal plasma. By contrast, for a kink background, not of sigma model form, the finite T induced fermion number is temperature dependent but topological.en
dc.description.statementofresponsibilityI. J. R. Aitchison and G.V. Dunneen
dc.identifier.citationPhysical Review Letters, 2001; 86(9):1690-1693en
dc.identifier.doi10.1103/PhysRevLett.86.1690en
dc.identifier.issn0031-9007en
dc.identifier.urihttp://hdl.handle.net/2440/11202
dc.language.isoenen
dc.publisherAmerican Physical Societyen
dc.rights©2001 The American Physical Societyen
dc.titleNontopological finite temperature induced fermion numberen
dc.typeJournal articleen

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