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1826200121235210240
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MIT
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© 2019 CERN, for the LHCb Collaboration. Published by the American Physical Society under the terms of the https://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP 3 . We report measurements of the lifetimes of the Λc+, Ξc+ and Ξc0 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 Λc+→pK-π+, Ξc+→pK-π+ and Ξc0→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 τΛc+=203.5±1.0±1.3±1.4 fs, τΞc+=456.8±3.5±2.9±3.1 fs, τΞc0=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 Λc+ and Ξc+ lifetimes are in agreement with previous measurements; however, the Ξc0 baryon lifetime is approximately 3.3 standard deviations larger than the world average value.
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2024-09-23T11:31:32Z
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Article
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mit-1721.1/133731
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Massachusetts Institute of Technology
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English
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2024-09-23T11:31:32Z
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2021
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American Physical Society (APS)
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dspace
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mit-1721.1/1337312022-04-01T17:20:48Z Precision measurement of the Λ c + , Ξ c + , and Ξ c 0 baryon lifetimes © 2019 CERN, for the LHCb Collaboration. Published by the American Physical Society under the terms of the https://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP 3 . We report measurements of the lifetimes of the Λc+, Ξc+ and Ξc0 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 Λc+→pK-π+, Ξc+→pK-π+ and Ξc0→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 τΛc+=203.5±1.0±1.3±1.4 fs, τΞc+=456.8±3.5±2.9±3.1 fs, τΞc0=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 Λc+ and Ξc+ lifetimes are in agreement with previous measurements; however, the Ξc0 baryon lifetime is approximately 3.3 standard deviations larger than the world average value. 2021-10-27T19:56:23Z 2021-10-27T19:56:23Z 2019 2021-03-26T14:28:19Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/133731 Aaij, R., et al. "Precision Measurement of the Lambda_{B}^{0} Baryon Lifetime." Phys Rev Lett 111 10 (2013): 102003. en 10.1103/PHYSREVD.100.032001 Physical Review D Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ application/pdf American Physical Society (APS) APS
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| spellingShingle |
Precision measurement of the Λ c + , Ξ c + , and Ξ c 0 baryon lifetimes
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| title |
Precision measurement of the Λ c + , Ξ c + , and Ξ c 0 baryon lifetimes
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| title_full |
Precision measurement of the Λ c + , Ξ c + , and Ξ c 0 baryon lifetimes
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| title_fullStr |
Precision measurement of the Λ c + , Ξ c + , and Ξ c 0 baryon lifetimes
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| title_full_unstemmed |
Precision measurement of the Λ c + , Ξ c + , and Ξ c 0 baryon lifetimes
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| title_short |
Precision measurement of the Λ c + , Ξ c + , and Ξ c 0 baryon lifetimes
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| title_sort |
precision measurement of the λ c ξ c and ξ c 0 baryon lifetimes
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| url |
https://hdl.handle.net/1721.1/133731
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