dc.contributor.author | Adhikari, Prabal | |
dc.contributor.author | Andersen, Jens Oluf | |
dc.date.accessioned | 2021-02-08T14:29:16Z | |
dc.date.available | 2021-02-08T14:29:16Z | |
dc.date.created | 2020-03-13T11:57:27Z | |
dc.date.issued | 2020 | |
dc.identifier.citation | Physics Letters B. 2020, 804 . | en_US |
dc.identifier.issn | 0370-2693 | |
dc.identifier.uri | https://hdl.handle.net/11250/2726659 | |
dc.description.abstract | We consider the thermodynamics of three-flavor QCD in the pion-condensed phase at nonzero isospin chemical potential (μI) and vanishing temperature using chiral perturbation theory in the isospin limit. The transition from the vacuum phase to a superfluid phase with a Bose-Einstein condensate of charged pions is shown to be second order and takes place at μI = mπ . We calculate the pressure, isospin density, and energy density to next-to-leading order in the low-energy expansion. Our results are compared with recent high-precision lattice simulations as well as previously obtained results in two-flavor chiral perturbation theory. The agreement between the lattice results and the predictions from three-flavor chiral perturbation theory is very good for μI < 200 MeV. For larger values of μI , the agreement between lattice data and the two-flavor predictions is surprisingly good and better than with the three-flavor predictions. Finally, in the limit ms mu = md, we show that the three-flavor observables reduce to the two-flavor observables with renormalized parameters. The disagreement between the results for twoflavor and three-flavor χPT can largely be explained by the differences in the measured low-energy constants | en_US |
dc.language.iso | eng | en_US |
dc.publisher | Elsevier | en_US |
dc.rights | Navngivelse 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.no | * |
dc.title | QCD at finite isospin density: chiral perturbation theory confronts lattice data | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | publishedVersion | en_US |
dc.source.pagenumber | 7 | en_US |
dc.source.volume | 804 | en_US |
dc.source.journal | Physics Letters B | en_US |
dc.identifier.doi | 10.1016/j.physletb.2020.135352 | |
dc.identifier.cristin | 1801517 | |
dc.description.localcode | © 2020 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/) | en_US |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 2 | |