Observation of the doubly-charmed-baryon decay Ξ cc + + → Ξ c 0 π + π +
Name
13130_2025_Article_27428.pdf
Size
838.99 KB
Format
Adobe PDF
Checksum (MD5)
c57b893a65be0dec4b6fc9223155b1f9
Author(s)
Aaij, R.
Abdelmotteleb, A. S. W.
Abellan Beteta, C.
Abudinén, F.
Ackernley, T.
Adefisoye, A. A.
Adeva, B.
Adinolfi, M.
Adlarson, P.
Agapopoulou, C.
Date Issued
October 16, 2025
Journal
Journal of High Energy Physics
Publisher
Springer Berlin Heidelberg
Citation
The LHCb collaboration., Aaij, R., Abdelmotteleb, A.S.W. et al. Observation of the doubly-charmed-baryon decay Ξ cc + + → Ξ c 0 π + π +. J. High Energ. Phys. 2025, 136 (2025).
Version
Final published version
Abstract
A search for the doubly-charmed-baryon decay Ξ cc + + → Ξ c 0 π + π + is performed using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of 13 TeV and corresponding to an integrated luminosity of 5.4 fb−1. A significant structure consistent with the Ξ cc + + baryon is observed in the Ξ c 0 π + π + invariant-mass spectrum. Using the Ξ cc + + → Λ c + K − π + π + decay as the normalisation channel, the branching fraction ratio, B Ξ cc + + → Ξ c 0 π + π + B Ξ cc + + → Λ c + K − π + π + , is measured to be 1.37 ± 0.18 (stat) ± 0.09 (syst) ± 0.35 (ext). This measurement provides critical input for testing QCD factorisation methods in the weak decays of doubly-heavy baryons, particularly in quantifying nonperturbative effects such as final-state interactions and resonance contributions to the hadronisation process.
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/10.1007/JHEP10(2025)136
