The Ω_c-puzzle solved by means of quark model predictions

Journal Article · 12 December 2019 · European Physical Journal. C, Particles and Fields

DOI: https://doi.org/10.1140/epjc/s10052-019-7527-4 · OSTI ID:1800739

Santopinto, E. ^[1]; Giachino, A. ^[2]; Ferretti, J. ^[3]; García-Tecocoatzi, H. ^[4]; Bedolla, M. A. ^[5]; Bijker, R. ^[6]; Ortiz-Pacheco, E. ^[6]

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1. Istituto Nazionale di Fisica Nucleare (INFN), Genoa (Italy); OSTI
2. Istituto Nazionale di Fisica Nucleare (INFN), Genoa (Italy); Univ. of Genoa (Italy). Dept. of Physics
3. Yale Univ., New Haven, CT (United States). Sloane Physics Lab., Center for Theoretical Physics
4. Univ. of La Plata (UNLP) (Argentina). Dept. of Physics
5. Istituto Nazionale di Fisica Nucleare (INFN), Genoa (Italy); Univ. Michoacana de San Nicolas de Hidalgo, Morelia (Mexico). Instituto de Física y Matemáticas
6. Univ. Nacional Autonoma de Mexico (UNAM), Mexico City (Mexico). Instituto de Ciencias Nucleare

The observation of five$$$$\varOmega _c $$$$ ${\Omega }_c$= ssc states by LHCb [Aaij et al. Phys. Rev. Lett.118, 182001(2017)] and the confirmation of four of them by Belle [Yelton et al. Phys. Rev. D97, 051102(2018)], may represent an important milestone in our understanding of the quark organization inside hadrons. By providing results for the spectrum of$$$$\varOmega _{ c}$$$$ ${\Omega }_c$baryons and predictions for their$$$$\varXi _{ c}^{+}K^{-}$$$$ ${\Xi }_c^{+}{K}^{-}$and$$$$\varXi _{ c}'^{+}K^{-}$$$$ ${\Xi }_c^{\text{'}+}{K}^{-}$decay amplitudes within an harmonic oscillator based model, we suggest a possible solution to the$$$$\varOmega _{c}$$$$ ${\Omega }_c$quantum number puzzle and we extend our mass and decay width predictions to the$$$$\varOmega _b$$$$ ${\Omega }_b$states. Finally, we discuss why the set of$$$$\varOmega _{ c(b)}$$$$ ${\Omega }_{c\left(b\right)}$baryons is the most suitable environment to test the validity of three-quark and quark–diquark effective degrees of freedom.

• Research Organization: Yale Univ., New Haven, CT (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• Grant/Contract Number: FG02-91ER40608
• OSTI ID: 1800739
• Journal Information: European Physical Journal. C, Particles and Fields, Journal Name: European Physical Journal. C, Particles and Fields Journal Issue: 12 Vol. 79; ISSN 1434-6044
• Publisher: SpringerCopyright Statement
• Country of Publication: United States
• Language: English