First observation of the doubly charmed baryon decay Ξcc++→Ξc+π+
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PhysRevLett.121.162002.pdf
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Author(s)
Aaij, R.
Adeva, B.
Adinolfi, M.
Aidala, C. A.
Ajaltouni, Z.
Akar, S.
Albicocco, P.
Albrecht, J.
Alessio, F.
Alexander, M.
Alternative Title
First observation of the doubly charmed baryon decay Ξ[subscript c under superscript +][subscript c under superscript +]→Ξc[subscript c under superscript +]π[superscript +]
Date Issued
October 2018
Journal
Physical review letters
Publisher
American Physical Society
Citation
Aaij, R., et al., "First observation of the doubly charmed baryon decay Ξcc++→Ξc+π+." Physical review letters 121 (October 2018): no. 162002 doi 10.1103/PhysRevLett.121.162002 ©2018 Author(s)
Version
Final published version
Abstract
The doubly charmed baryon decay Ξ[subscript c under superscript +][subscript c under superscript +]→Ξ[subscript c under superscript +]π[superscript +] is observed for the first time, with a statistical significance of 5.9σ, confirming a recent observation of the baryon in the Λ[subscript c under superscript +]K[superscript -]π[superscript +]π[superscript +] final state. The data sample used corresponds to an integrated luminosity of 1.7 fb-¹, collected by the LHCb experiment in pp collisions at a center-of-mass energy of 13 TeV. The Ξ[subscript c under superscript +][subscript c under superscript +] mass is measured to be 3620.6±1.5(stat)±0.4(syst)±0.3(Ξ) MeV/c² and is consistent with the previous result. The ratio of branching fractions between the decay modes is measured to be [B(Ξ[subscript c under superscript +][subscript c under superscript +]→Ξ[subscript c under superscript +]π[superscript +])×B(Ξ[subscript c under superscript +]→pK[superscript -]π[superscript +])]/[B(Ξ[subscript c under superscript +][subscript c under superscript +]→Λ[subscript c under superscript +]K[superscript -]π[superscript +]π[superscript +])×B(Λ[subscript c under superscript +]→pK[superscript -]π[superscript +)]=0.035±0.009(stat)±0.003(syst). ©2018
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Creative Commons Attribution 3.0 unported license
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DOI of Published Version
10.1103/PhysRevLett.121.162002
