Precision measurement of the Λ+c, Ξ+c, and Ξ0c baryon lifetimes
We report measurements of the lifetimes of the Λ+c, Ξ+c and Ξ0c charm baryons using proton-proton collision data at center-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of 3.0 fb−1, collected by the LHCb experiment. The charm baryons are reconstructed through the decays...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
1 August 2019
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| In: |
Physical review
Year: 2019, Jahrgang: 100, Heft: 3 |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/PhysRevD.100.032001 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevD.100.032001 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.100.032001 
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| Verfasserangaben: | R. Aaij et al.*(LHCb Collaboration) |
MARC
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| 245 | 1 | 0 | |a Precision measurement of the Λ+c, Ξ+c, and Ξ0c baryon lifetimes |c R. Aaij et al.*(LHCb Collaboration) |
| 246 | 3 | 0 | |a Λ , Ξ |
| 246 | 3 | 3 | |a Precision measurement of the lambda + c, xi + c, and xi 0 c baryon lifetimes |
| 264 | 1 | |c 1 August 2019 | |
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a Computermedien |b c |2 rdamedia | ||
| 338 | |a Online-Ressource |b cr |2 rdacarrier | ||
| 500 | |a Im Titel sind "+" und "0" hochgestellt, "c" ist tiefgestellt | ||
| 500 | |a LHCb Collaboration: R. Aaij, F. Archilli, S. Bachmann, D. Berninghoff, M. Borsato, S. Braun, A. Comerma-Montells, P. d’Argent, M. Dziewiecki, D. Gerick, J.P. Grabowski, X. Han, S. Hansmann-Menzemer, J. Hu, M. Kecke, M. Kolpin, R. Kopecna, B. Leverington, H. Malygina, J. Marks, D. Mitzel, S. Neubert, A. Piucci, M. Schmelling, N. Skidmore, M. Stahl, S. Stemmle, U. Uwer, A. Zhelezov und weitere 822 | ||
| 500 | |a Gesehen am 28.07.2020 | ||
| 520 | |a We report measurements of the lifetimes of the Λ+c, Ξ+c and Ξ0c charm baryons using proton-proton collision data at center-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of 3.0 fb−1, collected by the LHCb experiment. The charm baryons are reconstructed through the decays Λ+c→pK−π+, Ξ+c→pK−π+ and Ξ0c→pK−K−π+, and originate from semimuonic decays of beauty baryons. The lifetimes are measured relative to that of the D+ meson, and are determined to be τΛ+c=203.5±1.0±1.3±1.4 fs, τΞ+c=456.8±3.5±2.9±3.1 fs, τΞ0c=154.5±1.7±1.6±1.0 fs, where the uncertainties are statistical, systematic, and due to the uncertainty in the D+ lifetime. The measurements are approximately 3-4 times more precise than the current world average values. The Λ+c and Ξ+c lifetimes are in agreement with previous measurements; however, the Ξ0c baryon lifetime is approximately 3.3 standard deviations larger than the world average value. | ||
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