Observation of a new [xi]-b resonance
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 res...
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , |
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| Corporate Author: | |
| Format: | Article (Journal) |
| Language: | English |
| Published: |
15 August 2018
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| In: |
Physical review letters
Year: 2018, Volume: 121, Issue: 07 |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.121.072002 |
| Online Access: | Verlag, Volltext: https://doi.org/10.1103/PhysRevLett.121.072002 Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.121.072002 
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| Author Notes: | R. Aaij et al.* (LHCb collaboration) |
MARC
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| 110 | 2 | |a LHCb Collaboration |e VerfasserIn |0 (DE-588)1166245764 |0 (DE-627)1030265593 |0 (DE-576)510686508 |4 aut | |
| 245 | 1 | 0 | |a Observation of a new [xi]-b resonance |c R. Aaij et al.* (LHCb collaboration) |
| 246 | 3 | 0 | |a Ξ |
| 246 | 3 | 3 | |a Observation of a new xi minus b resonance |
| 264 | 1 | |c 15 August 2018 | |
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| 500 | |a Im Titel ist "xi" als griechischer Buchstabe dargestellt | ||
| 500 | |a LHCb collaboration: R. Aaij, P. d'Argent, S. Bachmann, S. Braun, A. Comerma-Montells, D. Gerick, X. Han, S. Hansmann-Menzemer, M. Kecke, B. Leverington, J. Marks, D.S. Mitzel, S. Neubert, A. Piucci, M. Stahl, S. Stemmle, U. Uwer, A. Zhelezov [und weitere] | ||
| 500 | |a Gesehen am 28.05.2019 | ||
| 520 | |a 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. | ||
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