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Title: | Observation of the doubly Cabibbo-suppressed decay Ξ c+ → pϕ |
Author: | LHCb Collaboration Alfonso Albero, Alejandro Calvo Gómez, Míriam Camboni, Alessandro Coquereau, Samuel Garrido Beltrán, Lluís Gascón Fora, David Gironella Gironell, Pere Graciani Díaz, Ricardo Graugés Pous, Eugeni Vilasis-Cardona, Xavier Marin Benito, Carla |
Keywords: | Hadrons Física de partícules Experiments Hadrons Particle physics Experiments |
Issue Date: | 10-Apr-2019 |
Publisher: | Springer Verlag |
Abstract: | The doubly Cabibbo-suppressed decay Ξ +c → pϕ with ϕ → K+K− is observed for the first time, with a statistical significance of more than fifteen standard deviations. The data sample used in this analysis corresponds to an integrated luminosity of 2 fb−1 recorded with the LHCb detector in pp collisions at a centre-of-mass energy of 8 TeV. The ratio of branching fractions between the decay Ξ +c → pϕ and the singly Cabibbo-suppressed decay Ξ +c → pK−π+ is measured to be B(Ξ+c→pϕ)B(Ξ+c→pK−π+)=(19.8±0.7±0.9±0.2)×10−3, where the first uncertainty is statistical, the second systematic and the third due to the knowledge of the ϕ → K+K− branching fraction. |
Note: | Reproducció del document publicat a: https://doi.org/10.1007/JHEP04(2019)084 |
It is part of: | Journal of High Energy Physics, 2019, p. 84 |
URI: | http://hdl.handle.net/2445/162296 |
Related resource: | https://doi.org/10.1007/JHEP04(2019)084 |
ISSN: | 1126-6708 |
Appears in Collections: | Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) Articles publicats en revistes (Física Quàntica i Astrofísica) |
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