Peláez, J R; Rodas, A; Ruiz de Elvira, J (2023). f_{0}(1370) Controversy from Dispersive Meson-Meson Scattering Data Analyses. Physical review letters, 130(5), 051902. American Physical Society 10.1103/PhysRevLett.130.051902
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We establish the existence of the long-debated f_{0}(1370) resonance in the dispersive analyses of meson-meson scattering data. For this, we present a novel approach using forward dispersion relations, valid for generic inelastic resonances. We find its pole at (1245±40)-i(300_{-70}^{+30}) MeV in ππ scattering. We also provide the couplings as well as further checks extrapolating partial-wave dispersion relations or with other continuation methods. A pole at (1380_{-60}^{+70})-i(220_{-70}^{+80}) MeV also appears in the ππ→KK[over ¯] data analysis with partial-wave dispersion relations. Despite settling its existence, our model-independent dispersive and analytic methods still show a lingering tension between pole parameters from the ππ and KK[over ¯] channels that should be attributed to data.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC) 08 Faculty of Science > Institute of Theoretical Physics |
UniBE Contributor: |
Ruiz de Elvira Carrascal, Jacobo |
Subjects: |
500 Science > 530 Physics |
ISSN: |
0031-9007 |
Publisher: |
American Physical Society |
Language: |
English |
Submitter: |
Pubmed Import |
Date Deposited: |
20 Feb 2023 15:45 |
Last Modified: |
26 Feb 2023 02:16 |
Publisher DOI: |
10.1103/PhysRevLett.130.051902 |
PubMed ID: |
36800462 |
BORIS DOI: |
10.48350/178924 |
URI: |
https://boris.unibe.ch/id/eprint/178924 |
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