Consistency between SU(3) and SU(2) covariant baryon chiral perturbation theory for the nucleon mass

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dc.contributor.authorRen, Xiu-Leien_ZA
dc.contributor.authorAlvarez-Ruso, L.en_ZA
dc.contributor.authorGeng, Li-Shengen_ZA
dc.contributor.authorLedwig, Timen_ZA
dc.contributor.authorMeng, Jieen_ZA
dc.contributor.authorVacas, M. J. Vicenteen_ZA
dc.date.accessioned2018-11-09T07:28:00Z
dc.date.available2018-11-09T07:28:00Z
dc.date.issued2017
dc.descriptionCITATION: Ren, X. L., et al. 2017. Consistency between SU(3) and SU(2) covariant baryon chiral perturbation theory for the nucleon mass. Physics Letters B, 766:325-333, doi:10.1016/j.physletb.2017.01.024.en_ZA
dc.descriptionThe original publication is available at https://www.sciencedirect.comen_ZA
dc.description.abstractTreating the strange quark mass as a heavy scale compared to the light quark mass, we perform a matching of the nucleon mass in the SU(3) sector to the two-flavor case in covariant baryon chiral perturbation theory. The validity of the 19 low-energy constants appearing in the octet baryon masses up to next-to-next-to-next-to-leading order [1] is supported by comparing the effective parameters (the combinations of the 19 couplings) with the corresponding low-energy constants in the SU(2) sector [2]. In addition, it is shown that the dependence of the effective parameters and the pion-nucleon sigma term on the strange quark mass is relatively weak around its physical value, thus providing support to the assumption made in Ref. [2] that the SU(2) baryon chiral perturbation theory can be applied to study nf = 2+1 lattice QCD simulations as long as the strange quark mass is close to its physical value.en_ZA
dc.description.urihttps://www.sciencedirect.com/science/article/pii/S037026931730031X
dc.description.versionPublisher's versionen_ZA
dc.format.extent9 pages : illustrations (some colour)en_ZA
dc.identifier.citationRen, X. L., et al. 2017. Consistency between SU(3) and SU(2) covariant baryon chiral perturbation theory for the nucleon mass. Physics Letters B, 766:325-333, doi:10.1016/j.physletb.2017.01.024en_ZA
dc.identifier.issn1873-2445 (online)
dc.identifier.issn0370-2693 (print)
dc.identifier.otherdoi:10.1016/j.physletb.2017.01.024
dc.identifier.urihttp://hdl.handle.net/10019.1/104661
dc.language.isoen_ZAen_ZA
dc.publisherElsevieren_ZA
dc.rights.holderAuthors retain copyrighten_ZA
dc.subjectBaryon chiral perturbation theoryen_ZA
dc.subjectNuclear physicsen_ZA
dc.subjectNucleon massen_ZA
dc.titleConsistency between SU(3) and SU(2) covariant baryon chiral perturbation theory for the nucleon massen_ZA
dc.typeArticleen_ZA
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