Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/132560
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
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 (Electrònica)
Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))

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