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First evidence for the two-body charmless baryonic decay
LHCb Collaboration; Calvo Gómez, M.; Camboni, Alessandro; Comerma Montells, Albert; Garrido Beltrán, Lluís; Graciani Díaz, Ricardo; Graugés Pous, Eugeni; Oyanguren, A.; Pérez-Calero Yzquierdo, Antonio; Picatoste Olloqui, Eduardo; Potterat, Cédric; Rives Molina, V.; Ruiz, Hugo (Ruiz Pérez); Ruiz Valls, P.; Vilasis-Cardona, X.
Universitat de Barcelona
The results of a search for the rare two-body charmless baryonic decays TeX and TeX are reported. The analysis uses a data sample, corresponding to an integrated luminosity of 0.9 fb−1, of pp collision data collected by the LHCb experiment at a centre-of-mass energy of 7 TeV. An excess of TeX candidates with respect to background expectations is seen with a statistical significance of 3.3 standard deviations. This is the first evidence for a two-body charmless baryonic B 0 decay. No significant TeX signal is observed, leading to an improvement of three orders of magnitude over previous bounds. If the excess events are interpreted as signal, the 68.3% confidence level intervals on the branching fractions are $ TeX $ where the first uncertainty is statistical and the second is systematic.
Cromodinàmica quàntica
Partícules (Física nuclear)
Física nuclear
Barions
Quantum chromodynamics
Particles (Nuclear physics)
Nuclear physics
Baryons
cc by, (c) LHCb Collaboration, 2013
http://creativecommons.org/licenses/by/3.0/
Artículo
info:eu-repo/semantics/publishedVersion
Springer Verlag
         

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