Measurement of the mass difference and relative production rate of the Ω−b and Ξ−b baryons
The mass difference between the Ω−b and Ξ−b baryons is measured using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb−1, and is found to be m(Ω−b)−m(Ξ−b)=248.54±0.51(stat)±0.38(syst) MeV/c2. The mass of the Ω−b baryon is measured to be...
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
18 September 2023
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| In: |
Physical review
Year: 2023, Jahrgang: 108, Heft: 5, Pages: 1-16 |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/PhysRevD.108.052008 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.1103/PhysRevD.108.052008 Verlag, kostenfrei, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.108.052008 
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| Verfasserangaben: | LHCb Collaboration |
MARC
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| 245 | 1 | 0 | |a Measurement of the mass difference and relative production rate of the Ω−b and Ξ−b baryons |c LHCb Collaboration |
| 246 | 3 | 3 | |a Measurement of the mass difference and relative production rate of the omega−b and xi−b baryons |
| 264 | 1 | |c 18 September 2023 | |
| 300 | |b Illustrationen | ||
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| 337 | |a Computermedien |b c |2 rdamedia | ||
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| 500 | |a The LHCb Collaboration: R. Aaij, S. Bachmann, M. Borsato, R. Caspary, G. Frau, P.A. Günther, X. Han, S. Hansmann-Menzemer, J. Hu, J. Kubat, B. Leverington, J. Marks, M.P. Morgenthaler, R. Skuza, D. Unverzagt, U. Uwer, C. Wang, L. Witola, Y. Zhao, A. Zhelezov [und 1046 weitere] | ||
| 500 | |a Im Titel erscheinen die "-" hochgestellt, die "b" tiefgestellt | ||
| 500 | |a Gesehen am 16.02.2024 | ||
| 520 | |a The mass difference between the Ω−b and Ξ−b baryons is measured using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb−1, and is found to be m(Ω−b)−m(Ξ−b)=248.54±0.51(stat)±0.38(syst) MeV/c2. The mass of the Ω−b baryon is measured to be m(Ω−b)=6045.9±0.5(stat)±0.6(syst) MeV/c2. This is the most precise determination of the Ω−b mass to date. In addition, the production rate of Ω−b baryons relative to that of Ξ−b baryons is measured for the first time in pp collisions, using an LHCb dataset collected at a center-of-mass energy of 13 TeV and corresponding to an integrated luminosity of 6 fb−1. Reconstructing beauty baryons in the kinematic region 2<η<6 and pT<20 GeV/c with their decays to a J/ψ meson and a hyperon, the ratio fΩ−bfΞ−b×B(Ω−b→J/ψΩ−)B(Ξ−b→J/ψΞ−)=0.120±0.008(stat)±0.008(syst), is obtained, where fΩ−b and fΞ−b are the fragmentation fractions of b quarks into Ω−b and Ξ−b baryons, respectively, and B represents the branching fractions of their respective decays. | ||
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