Precision measurement of the Ξ−b baryon lifetime
A sample of 𝑝𝑝 collision data, corresponding to an integrated luminosity of 5.5 fb−1 and collected by the LHCb experiment during LHC Run 2, is used to measure the ratio of the lifetime of the Ξ−𝑏 baryon to that of the Λ0𝑏 baryon, 𝑟𝜏 ≡𝜏Ξ−𝑏/𝜏Λ0𝑏. The value 𝑟𝜏 =1.076 ±0.013 ±0.006 is obtained, where t...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Körperschaft: | |
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
3 October 2024
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| In: |
Physical review
Year: 2024, Jahrgang: 110, Heft: 7, Pages: 1-16 |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/PhysRevD.110.072002 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.1103/PhysRevD.110.072002 Verlag, kostenfrei, Volltext: https://journals.aps.org/prd/abstract/10.1103/PhysRevD.110.072002 |
| Verfasserangaben: | R. Aaij et al., (LHCb Collaboration) |
MARC
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| 245 | 1 | 0 | |a Precision measurement of the Ξ−b baryon lifetime |c R. Aaij et al., (LHCb Collaboration) |
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| 246 | 3 | 3 | |a Precision measurement of the xi minus b baryon lifetime |
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| 500 | |a Im Titel ist das Zeichen "-" hochgestellt und der Buchstabe "b" ist tiefgestellt | ||
| 500 | |a The LHCb collaboration: R. Aaij, S. Bachmann, L. Carus, R. Caspary, S. Celani, C. Cocha Toapaxi, M. De Cian, L. Dittmann, S. Esen, F.C. Glaser, P.A. Günther, X. Han, S. Hausmann-Menzemer, P. Herrero Gascon, J. Hu, J. Kubat, C. Langenbruch, B. Leverington, J. Marks, M.P. Morgenthaler, P.R. Pais, S.R. Roy, M. Ruiz Diaz, M. Schmelling, G. Tuci, L.H. Uecker, D.J. Unverzagt, U. Uwer, C. Wang, L. Witola, Y. Zhao, A. Zhelezov und weitere 1057 | ||
| 500 | |a Gesehen am 14.07.2025 | ||
| 520 | |a A sample of collision data, corresponding to an integrated luminosity of 5.5 fb−1 and collected by the LHCb experiment during LHC Run 2, is used to measure the ratio of the lifetime of the Ξ− baryon to that of the Λ0 baryon, ≡Ξ−/Λ0. The value =1.076 ±0.013 ±0.006 is obtained, where the first uncertainty is statistical and the second systematic. This value is averaged with the corresponding value from Run 1 to obtain Run 1,2 =1.078 ±0.012 ±0.007. Multiplying by the world-average value of the Λ0 lifetime yields Run 1,2Ξ−=1.578±0.018±0.010±0.011 ps, where the uncertainties are statistical, systematic, and due to the limited knowledge of the Λ0 lifetime. This measurement improves the precision of the current world average of the Ξ− lifetime by about a factor of 2, and is in good agreement with the most recent theoretical predictions. | ||
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