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Title: | Observation of a New Ξ−b Resonance |
Authors: | Aaij, Roel Panshin, Gennady Leonidovich Strokov, Sergey Aleksandrovich Vagner, Aleksandr Rudolfovich |
Issue Date: | 2018 |
Publisher: | Томский политехнический университет |
Citation: | Observation of a New Ξ−b Resonance / R. Aaij [et al.] // Physical Review Letters. — 2018. — Vol. 121, iss. 7. — [072002 , 12 p.]. |
Abstract: | From samples of pp collision data collected by the LHCb experiment at √s=7, 8 and 13 TeV, corresponding to integrated luminosities of 1.0, 2.0 and 1.5 fb−1, respectively, a peak in both the Λ0bK− and Ξ0bπ− invariant mass spectra is observed. In the quark model, radially and orbitally excited Ξ−b resonances with quark content bds are expected. Referring to this peak as Ξb(6227)−, the mass and natural width are measured to be mΞb(6227)−=6226.9±2.0±0.3±0.2 MeV/c2 and ΓΞb(6227)−=18.1±5.4±1.8 MeV/c2, where the first uncertainty is statistical, the second is systematic, and the third, on mΞb(6227)−, is due to the knowledge of the Λ0b baryon mass. Relative production rates of the Ξb(6227)−→Λ0bK− and Ξb(6227)−→Ξ0bπ− decays are also reported. |
URI: | http://earchive.tpu.ru/handle/11683/57796 |
Appears in Collections: | Репринты научных публикаций |
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File | Description | Size | Format | |
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reprint-nw-26833.pdf | 470,23 kB | Adobe PDF | View/Open |
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