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Author (up) LHCb Collaboration (Aaij, R. et al); Fernandez Casani, A.; Jaimes Elles, S.J.; Jashal, B.K.; Libralon, S.; Martinez-Vidal, F.; Mazorra de Cos, J.; Oyanguren, A.; Rebollo De Miguel, M.; Sanderswood, I.; Zhuo, J. url  doi
openurl 
  Title Observation of the doubly-charmed-baryon decay Ξcc++ → Ξc0 π+ π+ Type Journal Article
  Year 2025 Publication Journal of High Energy Physics Abbreviated Journal J. High Energy Phys.  
  Volume 10 Issue 10 Pages 136 - 23pp  
  Keywords Branching fraction; Charm Physics; Hadron-Hadron Scattering; QCD  
  Abstract A search for the doubly-charmed-baryon decay Xi(++)(cc) -> Xi(0)(c)pi pi(+) pi(+) is performed using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of 13TeV and corresponding to an integrated luminosity of 5.4 fb(-1). A significant structure consistent with the Xi(++)(cc) cc baryon is observed in the Xi(0)(c) pi(+)pi(+) invariant-mass spectrum. Using the Xi(++)(cc) ->Lambda(+)(c) K- pi(+pi+) decay as the normalisation channel, the branching fraction ratio, B(Xi(++)(cc) -> 0c p+p+)/ B(Xi(++)(cc) -> Lambda K-+(c)- pi(+)pi(+)), 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.  
  Address [Bonacci, R. B.; Torres, M. Cruz; Dekkers, S.; Egede, U.; Fujii, Y.; Hadavizadeh, T.; Harris, T. H.; Henderson, R. D. L.; Lane, J. J.; Liu, F. L.; Monk, M.; Song, R.; Walton, E. J.; Ward, J. A.] Monash Univ, Sch Phys & Astron, Melbourne, Vic, Australia, Email: xingyu.tong@cern.ch  
  Corporate Author Thesis  
  Publisher Springer Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes WOS:001639142900001 Approved no  
  Is ISI yes International Collaboration yes  
  Call Number IFIC @ pastor @ Serial 7062  
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