Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/132663
Title: Observation of D0 Meson Decays to π+π−μ+μ− and K+K−μ+μ− Final States
Author: Alfonso Albero, Alejandro
Badalov, Alexey
Calvo Gómez, Míriam
Camboni, Alessandro
Coquereau, Samuel
Fernandez, G.
Garrido Beltrán, Lluís
Gascón Fora, David
Graciani Díaz, Ricardo
Graugés Pous, Eugeni
Marin Benito, Carla
Picatoste Olloqui, Eduardo
Rives Molina, Vicente José
Vilasis-Cardona, Xavier
LHCb Collaboration
Keywords: Física de partícules
Experiments
Particle physics
Experiments
Issue Date: 31-Oct-2017
Publisher: American Physical Society
Abstract: The first observation of the D0→π+π-μ+μ- and D0→K+K-μ+μ- decays is reported using a sample of proton-proton collisions collected by LHCb at a center-of-mass energy of 8 TeV, and corresponding to 2 fb-1 of integrated luminosity. The corresponding branching fractions are measured using as normalization the decay D0→K-π+[μ+μ-]ρ0/ω, where the two muons are consistent with coming from the decay of a ρ0 or ω meson. The results are B (D0→π+π-μ+μ- )=(9.64 ±0.48 ±0.51 ±0.97 )×10-7 and B (D0→K+K-μ+μ- )=(1.54 ±0.27 ±0.09 ±0.16 )×10-7 , where the uncertainties are statistical, systematic, and due to the limited knowledge of the normalization branching fraction. The dependence of the branching fraction on the dimuon mass is also investigated.
Note: Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.119.181805
It is part of: Physical Review Letters, 2017, vol. 119, num. 18, p. 181805
URI: http://hdl.handle.net/2445/132663
Related resource: https://doi.org/10.1103/PhysRevLett.119.181805
ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))
Articles publicats en revistes (Física Quàntica i Astrofísica)
Articles publicats en revistes (Electrònica)

Files in This Item:
File Description SizeFormat 
678026.pdf354.49 kBAdobe PDFView/Open


This item is licensed under a Creative Commons License Creative Commons