First observation of the doubly charmed baryon decay Xicc++ -> Xic+ pi+
C. Gotti, J. P. Grabowski,R. Graciani Diaz,L. A. Granado Cardoso, E. Graugés,E. Graverini, G. Graziani,A. Grecu, R. Greim, P. Griffith, L. Grillo, L. Gruber, O. Grünberg, C. Gu, E. Gushchin,Yu. Guz, T. Gys, C. Göbel,T. Hadavizadeh,C. Hadjivasiliou, G. Haefeli, C. Haen, B. Hamilton, X. Han, T. H. Hancock, N. Harnew, S. T. Harnew, T. Harrison,C. Hasse, M. Hatch, M. Hecker, K. Heinicke, A. Heister, K. Hennessy, L. Henry,E. van Herwijnen, M. Heß,A. Hicheur,R. Hidalgo Charman,D. Hill, M. Hilton, P. H. Hopchev, W. Huang, Z. C. Huard, W. Hulsbergen,T. Humair,M. Hushchyn, D. Hutchcroft, D. Hynds, P. Ibis, M. Idzik, P. Ilten, K. Ivshin, R. Jacobsson, J. Jalocha, E. Jans, A. Jawahery, F. Jiang, M. John, D. Johnson, C. R. Jones, C. Joram, B. Jost,N. Jurik, S. Kandybei, M. Karacson, J. M. Kariuki, S. Karodia,N. Kazeev, M. Kecke, F. Keizer, M. Kelsey, M. Kenzie, T. Ketel, E. Khairullin, B. Khanji, C. Khurewathanakul, T. Kirn, S. Klaver, T. Klimkovich, S. Koliiev, M. Kolpin, R. Kopecna, P. Koppenburg, I. Kostiuk, S. Kotriakhova, M. Kozeiha, L. Kravchuk, M. Kreps, F. Kress, P. Krokovny, W. Krzemien, W. Kucewicz, M. Kucharczyk,V. Kudryavtsev, A. K. Kuonen, T. Kvaratskheliya, D. Lacarrere, G. Lafferty, A. Lai, D. Lancierini, G. Lanfranchi, C. Langenbruch, T. Latham, C. Lazzeroni, A. Leflat, J. Lefrançois, R. Lefèvre, F. Lemaitre, O. Leroy, T. Lesiak, B. Leverington, X. Liang,T. Likhomanenko, R. Lindner, F. Lionetto, V. Lisovskyi, X. Liu, I. Longstaff,J. H. Lopes, G. H. Lovell, D. Lucchesi, A. Lupato, E. Luppi,O. Lupton, A. Lusiani, X. Lyu, F. Machefert, F. Maciuc, V. Macko, P. Mackowiak, O. Maev, K. Maguire, D. Maisuzenko, S. Malde, B. Malecki, A. Malinin, T. Maltsev, G. Manca, G. Mancinelli, D. Marangotto, J. Maratas,C. Marin Benito, M. Marinangeli, P. Marino, P. J. Marshall, G. Martellotti, M. Martin, M. Martinelli,D. Martinez Santos,F. Martinez Vidal, A. Massafferri, M. Materok, R. Matev, A. Mathad, Z. Mathe, C. Matteuzzi, A. Mauri,E. Maurice, B. Maurin, A. Mazurov, M. McCann, A. McNab, R. McNulty,J. V. Mead, B. Meadows, C. Meaux, N. Meinert, D. Melnychuk, A. Merli, D. A. Milanes, E. Millard, L. Minzoni, D. S. Mitzel, A. Mogini,J. Molina Rodriguez, T. Mombächer, I. A. Monroy, S. Monteil, M. Morandin, G. Morello, O. Morgunova, A. B. Morris, F. Muheim, A. Mödden, P. Naik, T. Nakada, R. Nandakumar, A. Nandi, T. Nanut, N. Neri, S. Neubert, N. Neufeld, M. Neuner, S. Nieswand, N. Nikitin, A. Nogay, R. Oldeman, A. Ossowska,J. M. Otalora Goicochea, P. Owen, A. Oyanguren, T. Pajero, A. Palano, M. Palutan, G. Panshin, A. Papanestis, M. Pappagallo, W. Parker, C. Parkes, G. Passaleva, A. Pastore, M. Patel, C. Patrignani, A. Pearce, A. Pellegrino, G. Penso, S. Perazzini, D. Pereima, P. Perret, L. Pescatore, K. Petridis, A. Petrolini, S. Petrucci, M. Petruzzo, B. Pietrzyk, G. Pietrzyk, J. Pinzino, A. Piucci, V. Placinta, S. Playfer, J. Plews, F. Polci, E. Polycarpo, S. Ponce, A. Popov, D. Popov, J. Prisciandaro semanticscholar（2018）
摘要
The doubly charmed baryon decay Ξ++ cc → Ξ+ c π+ is observed for the first time, with a statistical significance of 5.9σ, confirming a recent observation of the baryon in the Λc K −π+π+ 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++ cc mass is measured to be 3620.6± 1.5 (stat)± 0.4 (syst)± 0.3 (Ξ c ) MeV/c, and is consistent with the previous result. The ratio of branching fractions between the decay modes is measured to be B(Ξ++ cc → Ξ+ c π+)× B(Ξ+ c → pK−π+) B(Ξ++ cc → Λc K−π+π+)× B(Λc → pK−π+) = 0.035± 0.009 (stat)± 0.003 (syst). Published in Phys. Rev. Lett. 121, 162002 (2018) c © 2018 CERN for the benefit of the LHCb collaboration. CC-BY-4.0 licence. †Authors are listed at the end of this paper.
更多查看译文
AI 理解论文
溯源树
样例
