Strangeness content of the pion in the U(3) Nambu–Jona–Lasinio model

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dc.creatorBraghin, Fabio Luis
dc.date.accessioned2023-12-07T12:06:33Z
dc.date.available2023-12-07T12:06:33Z
dc.date.issued2022
dc.description.resumoThe Nambu–Jona–Lasinio model is considered with flavor-dependent coupling constants Gi j (ψλ¯ iψ)(ψλ¯ jψ) + (ψ¯iγ5λiψ)(ψ¯iγ5λjψ) for i, j = 0, 1 ...N2 f − 1, and N f = 3. A self-consistent calculation of quark effective masses and coupling constants is performed, making the strange quark effective mass vary considerably. Quantum mechanical mixings between up, down and strange constituent quarks yield a strangeness content (s-content) of the light u and d quark constituent and of the pion. Different types of estimates for the strangeness contribution for the pion mass are provided. Mixing-type interactions, Gi= j, induce light meson mixings, and estimates for the π0 − η and η − η mixings are provided. The η − π0 mixing is argued to be an indication of the s-content of the pion.
dc.identifier.citationBRAGHIN, Fabio L. Strangeness content of the pion in the U(3) Nambu-Jona-Lasinio model. Journal of Physics G: nuclear and particle physics, Bristol, v. 49, e055101, 2022. DOI: 10.1088/1361-6471/ac4d79. Disponível em: https://iopscience.iop.org/article/10.1088/1361-6471/ac4d79. Acesso em: 14 set. 2023.
dc.identifier.doi10.1088/1361-6471/ac4d79
dc.identifier.issn1361-6471
dc.identifier.urihttps://iopscience.iop.org/article/10.1088/1361-6471/ac4d79
dc.language.isoeng
dc.publisher.countryGra-bretanha
dc.publisher.departmentInstituto de Física - IF (RMG)
dc.rightsAcesso Restrito
dc.subjectPion
dc.subjectNambu–Jona–Lasinio
dc.subjectMeson mixing
dc.subjectPions
dc.subjectStrangeness content
dc.subjectChiral and flavor symmetry breakings
dc.titleStrangeness content of the pion in the U(3) Nambu–Jona–Lasinio model
dc.typeArtigo

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