Publications associated with Applications & Innovations


Observation of the Doubly Charmed Baryon Ξ_{cc}^{++}.

Physical review letters 119 (2017) 112001-

R Aaij, B Adeva, M Adinolfi, Z Ajaltouni, S Akar, J Albrecht, F Alessio, M Alexander, A Alfonso Albero, S Ali, G Alkhazov, P Alvarez Cartelle, AA Alves, S Amato, S Amerio, Y Amhis, L An, L Anderlini, G Andreassi, M Andreotti, JE Andrews, RB Appleby, F Archilli, P d'Argent, J Arnau Romeu, A Artamonov, M Artuso, E Aslanides, G Auriemma, M Baalouch, I Babuschkin, S Bachmann, JJ Back, A Badalov, C Baesso, S Baker, V Balagura, W Baldini, A Baranov, RJ Barlow, C Barschel, S Barsuk, W Barter, F Baryshnikov, V Batozskaya, V Battista, A Bay, L Beaucourt, J Beddow, F Bedeschi, I Bediaga, A Beiter, LJ Bel, N Beliy, V Bellee, N Belloli, K Belous, I Belyaev, E Ben-Haim, G Bencivenni, S Benson, S Beranek, A Berezhnoy, R Bernet, D Berninghoff, E Bertholet, A Bertolin, C Betancourt, F Betti, M-O Bettler, M van Beuzekom, I Bezshyiko, S Bifani, P Billoir, A Birnkraut, A Bitadze, A Bizzeti, MB Bjoern, T Blake, F Blanc, J Blouw, S Blusk, V Bocci, T Boettcher, A Bondar, N Bondar, W Bonivento, I Bordyuzhin, 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Gandelman, P Gandini, Y Gao, LM Garcia Martin, J García Pardiñas, J Garra Tico, L Garrido, PJ Garsed, D Gascon, C Gaspar, L Gavardi, G Gazzoni, D Gerick, E Gersabeck, M Gersabeck, T Gershon, P Ghez, S Gianì, V Gibson, OG Girard, L Giubega, K Gizdov, VV Gligorov, D Golubkov, A Golutvin, A Gomes, IV Gorelov, C Gotti, E Govorkova, JP Grabowski, R Graciani Diaz, LA Granado Cardoso, E Graugés, E Graverini, G Graziani, A Grecu, R Greim, P Griffith, L Grillo, L Gruber, BR Gruberg Cazon, O Grünberg, E Gushchin, Y Guz, T Gys, C Göbel, T Hadavizadeh, C Hadjivasiliou, G Haefeli, C Haen, SC Haines, B Hamilton, X Han, T Hancock, S Hansmann-Menzemer, N Harnew, ST Harnew, J Harrison, C Hasse, M Hatch, J He, M Hecker, K Heinicke, A Heister, K Hennessy, P Henrard, L Henry, E van Herwijnen, M Heß, A Hicheur, D Hill, C Hombach, PH Hopchev, Z-C Huard, W Hulsbergen, T Humair, M Hushchyn, D Hutchcroft, P Ibis, M Idzik, P Ilten, R Jacobsson, J Jalocha, E Jans, A Jawahery, F Jiang, M John, D Johnson, CR 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A highly significant structure is observed in the Λ_{c}^{+}K^{-}π^{+}π^{+} mass spectrum, where the Λ_{c}^{+} baryon is reconstructed in the decay mode pK^{-}π^{+}. The structure is consistent with originating from a weakly decaying particle, identified as the doubly charmed baryon Ξ_{cc}^{++}. The difference between the masses of the Ξ_{cc}^{++} and Λ_{c}^{+} states is measured to be 1334.94±0.72(stat.)±0.27(syst.)  MeV/c^{2}, and the Ξ_{cc}^{++} mass is then determined to be 3621.40±0.72(stat.)±0.27(syst.)±0.14(Λ_{c}^{+})  MeV/c^{2}, where the last uncertainty is due to the limited knowledge of the Λ_{c}^{+} mass. The state is observed in a sample of proton-proton collision data collected by the LHCb experiment at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 1.7  fb^{-1}, and confirmed in an additional sample of data collected at 8 TeV.


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