Bulletin of the American Physical Society
6th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
Sunday–Friday, November 26–December 1 2023; Hawaii, the Big Island
Session D04: Minisymposium: Exotic Hadrons I
9:00 AM–11:30 AM,
Wednesday, November 29, 2023
Hilton Waikoloa Village
Room: Kings 2
Chair: Elena Santopinto, INFN-Frascati Rome
Abstract: D04.00009 : Internal structure of Ω(2012) baryon in a coupled-channel approach*
11:15 AM–11:30 AM
Presenter:
Hideko Nagahiro
(Nara Women's University / RCNP Osaka University)
Authors:
Hideko Nagahiro
(Nara Women's University / RCNP Osaka University)
Qi-Fang Lyu
(Hunan Normal University)
Atsushi Hosaka
(RCNP, Osaka University)
Either one of the two structures, quark models like or molecule like, is realized only in the ideal limit, and they must coexist and mix to form the physical states. Therefore, the question is how they mix for the real state and what is the important basis state for explaining the physical properties of Ω(2012) baryon, such as mass spectra and its decays.
To understand the internal structure of Ω(2012) baryon, we perform a systematic analysis in a coupled-channel approach including the three-quark state and the Ξ*Kbar molecular state. For the latter, we also include possible effective Ξ*Kbar interactions by considering other possible coupled channels for a dynamically generated state. Our results suggest that both three-quark core and Ξ*Kbar channel are essential for the description of the Ω(2012) resonance. The spectroscopy of multiple strangeness baryons provides a good bridge for understanding the properties of hadrons from the light quark region to the heavy quark region.
*This work is supported by the National Natural Science Foundation of China under Grants No. 11705056 and No. U1832173, the Key Project of Hunan Provincial Education Department under Grant No. 21A0039, and the State Scholarship Fund of China Scholarship Council under Grant No. 202006725011. A. H. is supported by the Grants-in-Aid for Scientific Research [Grant No. 21H04478(A)] and the one on Innovative Areas (Grant No. 18H05407), and H. N. by the Grants-in-Aid for Scientific Research [Grant No. JP21K03536 (C)].
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