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Title: | First evidence for the two-body charmless baryonic decay |
Author: | Calvo Gómez, Míriam Camboni, Alessandro Comerma Montells, Albert Garrido Beltrán, Lluís Graciani Díaz, Ricardo Graugés Pous, Eugeni Oyanguren Campos, Arantza de Pérez-Calero Yzquierdo, Antonio Picatoste Olloqui, Eduardo Potterat, Cédric Rives Molina, Vicente José Ruiz, Hugo (Ruiz Pérez) Ruiz Valls, Pablo Vilasis-Cardona, Xavier LHCb Collaboration |
Keywords: | Cromodinàmica quàntica Partícules (Física nuclear) Física nuclear Barions Quantum chromodynamics Particles (Nuclear physics) Nuclear physics Baryons |
Issue Date: | Oct-2013 |
Publisher: | Springer Verlag |
Abstract: | 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. |
Note: | Reproducció del document publicat a: http://dx.doi.org/10.1007/JHEP10(2013)005 |
It is part of: | Journal of High Energy Physics, 2013, vol. 10, num. 5, p. 1-17 |
URI: | http://hdl.handle.net/2445/56385 |
Related resource: | http://dx.doi.org/10.1007/JHEP10(2013)005 |
ISSN: | 1126-6708 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) |
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