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Title: | Measurement of the ratio of branching fractions and difference in CP asymmetries of the decays B + → J/ ψπ + and B + → J/ ψK + |
Author: | Camboni, Alessandro Garrido Beltrán, Lluís Gascón Fora, David Graciani Díaz, Ricardo Graugés Pous, Eugeni Marin Benito, Carla Picatoste Olloqui, Eduardo Rives Molina, Vicente José Alfonso Albero, Alejandro Calvo Gomez, M. Coquereau, Samuel Gironella Gironell, Pere Vazquez Gomez, R. LHCb Collaboration |
Keywords: | Hadrons Gran Col·lisionador d'Hadrons Física de partícules Experiments Hadrons Large Hadron Collider (France and Switzerland) Particle physics Experiments |
Issue Date: | Mar-2017 |
Publisher: | Springer Verlag |
Abstract: | The ratio of branching fractions and the difference in CP asymmetries of the decays B + → J/ψπ + and B + → J/ψK + are measured using a data sample of pp collisions collected by the LHCb experiment, corresponding to an integrated luminosity of 3 fb-1 at centre-of-mass energies of 7 and 8 TeV. The results are B({B}+\to J/ψ {π}+)/B({B}+\to J/ψ {K}+)=(3.83± 0.03± 0.03)× {10}^{-2}, A^{CP}({B}+\to J/ψ {π}+)-A^{CP}({B}+\to J/ψ {K}+)=(1.82± 0.86± 0.14)× {10}^{-2}, where the first uncertainties are statistical and the second are systematic. Combining this result with a recent LHCb measurement of A^{CP}({B}+\to J/{ψ K}+) provides the most precise estimate to date of CP violation in the decay B + → J/ψπ +, A^{CP}({B}+\to J/{ψ π}+)=(1.91± 0.89± 0.16)× 1{0}^{-2}. |
Note: | Reproducció del document publicat a: https://doi.org/10.1007/JHEP03(2017)036 |
It is part of: | Journal of High Energy Physics, 2017, vol. 2017, num. 36, p. 1-18 |
URI: | http://hdl.handle.net/2445/186424 |
Related resource: | https://doi.org/10.1007/JHEP03(2017)036 |
ISSN: | 1126-6708 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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