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Title: | First Observation of the Doubly Charmed Baryon Decay Ξcc + + → Ξc+ π+ |
Author: | Alfonso Albero, Alejandro Calvo Gómez, Míriam Camboni, Alessandro Coquereau, Samuel Garrido Beltrán, Lluís Gascón Fora, David Graciani Díaz, Ricardo Graugés Pous, Eugeni Vilasis-Cardona, Xavier LHCb Collaboration Marin Benito, Carla |
Keywords: | Física de partícules Experiments Particle physics Experiments |
Issue Date: | 17-Oct-2018 |
Publisher: | American Physical Society |
Abstract: | The doubly charmed baryon decay Ξ + + c c → Ξ + c π + is observed for the first time, with a statistical significance of 5.9 σ , confirming a recent observation of the baryon in the Λ + c 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 p p collisions at a center-of-mass energy of 13 TeV. The Ξ + + c c mass is measured to be 3620.6 ± 1.5 ( stat ) ± 0.4 ( syst ) ± 0.3 ( Ξ + c ) MeV / c 2 and is consistent with the previous result. The ratio of branching fractions between the decay modes is measured to be [ B ( Ξ + + c c → Ξ + c π + ) × B ( Ξ + c → p K − π + ) ] / [ B ( Ξ + + c c → Λ + c K − π + π + ) × B ( Λ + c → p K − π + ) ] = 0.035 ± 0.009 ( stat ) ± 0.003 ( syst ) |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.121.162002 |
It is part of: | Physical Review Letters, 2018, vol. 121, num. 16, p. 162002 |
URI: | http://hdl.handle.net/2445/132560 |
Related resource: | https://doi.org/10.1103/PhysRevLett.121.162002 |
ISSN: | 0031-9007 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) Articles publicats en revistes (Enginyeria Electrònica i Biomèdica) Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) |
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