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Observation of the suppressed decay Λ b 0 → pπ − μ + μ −
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Aaij2017_Article_ObservationOfTheSuppressedDeca.pdf
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bfe6c99a18cb23ce2fda9ea345a4e0a2
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.]
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DOI of Published Version
http://dx.doi.org/10.1007/JHEP04(2017)029
