S- and p-wave structure of S = −1 meson–baryon scattering in the resonance region
We perform a simultaneous analysis of s- and p-waves of the S=−1 meson–baryon scattering amplitude using all low-energy experimental data. For the first time, differential cross section data are included for chiral unitary coupled-channel models. From this model s- and p-wave amplitudes are extracte...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2019-02-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269318309626 |
| Summary: | We perform a simultaneous analysis of s- and p-waves of the S=−1 meson–baryon scattering amplitude using all low-energy experimental data. For the first time, differential cross section data are included for chiral unitary coupled-channel models. From this model s- and p-wave amplitudes are extracted and we observe both well-known I(JP)=0(1/2−) s-wave states as well as a new I(JP)=1(1/2+) state absent in quark models and lattice QCD results. Multiple statistical and phenomenological tests suggest that, while the data clearly require an I=1 p-wave resonance, the new state just accounts for the absence of the decuplet Σ(1385)3/2+ in the model. |
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| ISSN: | 0370-2693 |