Observation of the suppressed decay Λ0 b → pπ−μ+μ−
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Aaij2017_Article_ObservationOfTheSuppressedDeca.pdf
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666.06 KB
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Checksum (MD5)
bfe6c99a18cb23ce2fda9ea345a4e0a2
Author(s)
The LHCb Collaboration
Boettcher, Thomas Julian
Ilten, Philip J
Williams, M.
Date Issued
April 2017
Journal
Journal of High Energy Physics
Citation
Aaij, R., B. Adeva, M. Adinolfi, Z. Ajaltouni, S. Akar, J. Albrecht, et al. “Observation of the Suppressed Decay Λ
b
0
→ Pπ
−
μ
+
μ
−
.” Journal of High Energy Physics 2017, no. 4 (April 2017). doi:10.1007/jhep04(2017)029.
Version
Final published version
Abstract
© 2017, The Author(s). The suppressed decay Λb0→ pπ−μ+μ−, excluding the J/ψ and ψ(2S) → μ+μ−resonances, is observed for the first time with a significance of 5.5 standard deviations. The analysis is performed with proton-proton collision data corresponding to an integrated luminosity of 3 fb−1collected with the LHCb experiment. The Λb0→ pπ−μ+μ−branching fraction is measured relative to the Λb0→ J/ψ(→μ+μ−)pπ−branching fraction givingℬ(Λb0→pπ−μ+μ−)ℬ(Λb0→J/ψ(→μ+μ−)pπ−)=0.044±0.012±0.007, where the first uncertainty is statistical and the second is systematic. This is the first observation of a b → d transition in a baryonic decay.[Figure not available: see fulltext.]
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1007/JHEP04(2017)029
