Observation of an Excited Ω^{-} Baryon

Observation of an Excited Ω^{-} Baryon

Using data recorded with the Belle detector, we observe a new excited hyperon, an Ω^{*-} candidate decaying into Ξ^{0}K^{-} and Ξ^{-}K_{S}^{0} with a mass of 2012.4±0.7(stat)±0.6(syst)  MeV/c^{2} and a width of Γ=6.4_{-2.0}^{+2.5}(stat)±1.6(syst)  MeV. The Ω^{*-} is seen primarily in ϒ(1S),ϒ(2S), an...

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Veröffentlicht in:Physical review letters 2018-08, Vol.121 (5), p.052003-052003, Article 052003
Hauptverfasser: Yelton, J, Adachi, I, Ahn, J K, Aihara, H, Al Said, S, Asner, D M, Atmacan, H, Aushev, T, Ayad, R, Babu, V, Badhrees, I, Bahinipati, S, Bakich, A M, Bansal, V, Beleño, C, Berger, M, Bhardwaj, V, Bhuyan, B, Bilka, T, Biswal, J, Bondar, A, Bonvicini, G, Bozek, A, Bračko, M, Browder, T E, Červenkov, D, Chekelian, V, Chen, A, Cheon, B G, Chilikin, K, Cho, K, Choi, S-K, Choi, Y, Choudhury, S, Cinabro, D, Cunliffe, S, Czank, T, Dash, N, Di Carlo, S, Doležal, Z, Dong, T V, Drásal, Z, Eidelman, S, Epifanov, D, Fast, J E, Fulsom, B G, Garg, R, Gaur, V, Gabyshev, N, Garmash, A, Gelb, M, Giri, A, Goldenzweig, P, Greenwald, D, Guido, E, Haba, J, Hayasaka, K, Hayashii, H, Hirose, S, Hou, W-S, Inami, K, Inguglia, G, Ishikawa, A, Itoh, R, Iwasaki, M, Iwasaki, Y, Jacobs, W W, Jeon, H B, Jia, S, Jin, Y, Joo, K K, Julius, T, Kaliyar, A B, Kang, K H, Karyan, G, Kato, Y, Kiesling, C, Kim, D Y, Kim, J B, Kim, K T, Kim, S H, Kinoshita, K, Kodyš, P, Korpar, S, Kotchetkov, D, Križan, P, Kroeger, R, Krokovny, P, Kuhr, T, Kumar, R, Kuzmin, A, Kwon, Y-J, Lange, J S, Lee, I S, Lee, S C, Li, L K, Li, Y B, Li Gioi, L, Libby, J, Liventsev, D
Format: Artikel
Sprache:eng
Schlagworte:
Baryons
Exotic baryons
Fragmentation into hadrons
Hadronic decays
High Energy Physics - Experiment
Hyperons
Particle Spectroscopy
Physics
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Quark model
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Beschreibung
Zusammenfassung:Using data recorded with the Belle detector, we observe a new excited hyperon, an Ω^{*-} candidate decaying into Ξ^{0}K^{-} and Ξ^{-}K_{S}^{0} with a mass of 2012.4±0.7(stat)±0.6(syst)  MeV/c^{2} and a width of Γ=6.4_{-2.0}^{+2.5}(stat)±1.6(syst)  MeV. The Ω^{*-} is seen primarily in ϒ(1S),ϒ(2S), and ϒ(3S) decays.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.121.052003