Observation of the 0 b → J/ψ−K+ decay
Name
10052_2024_Article_13114.pdf
Size
1.88 MB
Format
Adobe PDF
Checksum (MD5)
d184ebe6f69f9f7755b2f35c30f8a35a
Author(s)
Hayrapetyan, A.
Tumasyan, A.
Adam, W.
Andrejkovic, J. W.
Bergauer, T.
Chatterjee, S.
Damanakis, K.
Dragicevic, M.
Valle, A. E. D.
Hussain, P. S.
Date Issued
October 15, 2024
Journal
The European Physical Journal C
Publisher
Springer Berlin Heidelberg
Citation
CMS Collaboration., Hayrapetyan, A., Tumasyan, A. et al. Observation of the 0 b → J/ψ−K+ decay. Eur. Phys. J. C 84, 1062 (2024).
Version
Final published version
Abstract
Abstract Using proton–proton collision data corresponding to an integrated luminosity of 140 fb - 1 collected by the CMS experiment at s = 13 Te V , the Λ b 0 → J / ψ Ξ - K + decay is observed for the first time, with a statistical significance exceeding 5 standard deviations. The relative branching fraction, with respect to the Λ b 0 → ψ ( 2 S ) Λ decay, is measured to be B ( Λ b 0 → J / ψ Ξ - K + ) / B ( Λ b 0 → ψ ( 2 S ) Λ ) = [ 3.38 ± 1.02 ± 0.61 ± 0.03 ] % , where the first uncertainty is statistical, the second is systematic, and the third is related to the uncertainties in B ( ψ ( 2 S ) → J / ψ π + π - ) and B ( Ξ - → Λ π - ) .
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Creative Commons Attribution
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1140/epjc/s10052-024-13114-9
