This title appears in the Scientific Report :
2015
Please use the identifier:
http://dx.doi.org/10.1103/PhysRevC.91.065208 in citations.
Please use the identifier: http://hdl.handle.net/2128/9808 in citations.
K ¯ + N → K + Ξ reaction and S = − 1 hyperon resonances
K ¯ + N → K + Ξ reaction and S = − 1 hyperon resonances
The K¯¯¯+N→K+Ξ reaction is studied for center-of-momentum energies ranging from threshold to 3 GeV in an effective Lagrangian approach that includes the hyperon s- and u-channel contributions as well as a phenomenological contact amplitude. The latter accounts for the rescattering term in the scatte...
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Personal Name(s): | Jackson, Benjamin C. (Corresponding author) |
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Oh, Yongseok / Haberzettl, H. / Nakayama, K. | |
Contributing Institute: |
Theorie der Starken Wechselwirkung; IAS-4 Theorie der starken Wechselwirkung; IKP-3 |
Published in: | Physical Review C Physical review / C, 91 91 (2015 2015) 6 6, S. 065208 065208 |
Imprint: |
Woodbury, NY
Inst.
2015
2015-06-25 2015-06-01 |
DOI: |
10.1103/PhysRevC.91.065208 |
Document Type: |
Journal Article |
Research Program: |
Computational Science and Mathematical Methods |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/9808 in citations.
The K¯¯¯+N→K+Ξ reaction is studied for center-of-momentum energies ranging from threshold to 3 GeV in an effective Lagrangian approach that includes the hyperon s- and u-channel contributions as well as a phenomenological contact amplitude. The latter accounts for the rescattering term in the scattering equation and possible short-range dynamics not included explicitly in the model. Existing data are well reproduced and three above-the-threshold resonances were found to be required to describe the data, namely, the Λ(1890), Σ(2030), and Σ(2250). For the latter resonance we have assumed the spin-parity of JP=5/2− and a mass of 2265 MeV. The Σ(2030) resonance is crucial in achieving a good reproduction of not only the measured total and differential cross sections but also the recoil polarization asymmetry. More precise data are required before a more definitive statement can be made about the other two resonances, in particular, about the Σ(2250) resonance that is introduced to describe a small bump structure observed in the total cross section of K−+p→K++Ξ−. The present analysis also reveals a peculiar behavior of the total cross-section data in the threshold energy region in K−+p→K++Ξ−, where the P and D waves dominate instead of the usual S wave. Predictions for the target-recoil asymmetries of the K¯¯¯+N→K+Ξ reaction are also presented. |