dc.contributor.author | Adhikari, Prabal | |
dc.contributor.author | Andersen, Jens Oluf | |
dc.date.accessioned | 2021-02-08T14:46:21Z | |
dc.date.available | 2021-02-08T14:46:21Z | |
dc.date.created | 2020-07-09T14:35:20Z | |
dc.date.issued | 2020 | |
dc.identifier.citation | Journal of High Energy Physics (JHEP). 2020, . | en_US |
dc.identifier.issn | 1126-6708 | |
dc.identifier.uri | https://hdl.handle.net/11250/2726674 | |
dc.description.abstract | We consider three-flavor chiral perturbation theory (χPT) at zero temperature and nonzero isospin (µI ) and strange (µS) chemical potentials. The effective potential is calculated to next-to-leading order (NLO) in the π ±-condensed phase, the K±-condensed phase, and the K0/K¯ 0 -condensed phase. It is shown that the transitions from the vacuum phase to these phases are second order and take place when, |µI | = mπ, | 1 2 µI + µS| = mK, and | − 1 2 µI + µS| = mK, respectively at tree level and remains unchanged at NLO. The transition between the two condensed phases is first order. The effective potential in the pion-condensed phase is independent of µS and in the kaon-condensed phases, it only depends on the combinations ± 1 2 µI + µS and not separately on µI and µS. We calculate the pressure, isospin density and the equation of state in the pion-condensed phase and compare our results with recent (2 + 1)-flavor lattice QCD data. We find that the threeflavor χPT results are in good agreement with lattice QCD for µI < 200 MeV, however for larger values χPT produces values for observables that are consistently above lattice results. For µI > 200 MeV, the two-flavor results are in better agreement with lattice data. Finally, we consider the observables in the limit of very heavy s-quark, where they reduce to their two-flavor counterparts with renormalized couplings. The disagreement between the predictions of two and three flavor χPT can largely be explained by the differences in the experimental values of the low-energy constants. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | Springer | en_US |
dc.rights | Navngivelse 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.no | * |
dc.title | Pion and kaon condensation at zero temperature in three-flavor χ\chiχPT at nonzero isospin and strange chemical potentials at next-to-leading order | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | publishedVersion | en_US |
dc.source.pagenumber | 38 | en_US |
dc.source.journal | Journal of High Energy Physics (JHEP) | en_US |
dc.identifier.doi | https://doi.org/10.1007/JHEP06(2020)170 | |
dc.identifier.cristin | 1819123 | |
dc.description.localcode | Open Access, © The Authors. Article funded by SCOAP Creative Commons Attribution License (CC-BY 4.0), | en_US |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 2 | |