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Title: Measurement of the lifetime of the Bc+ meson using the Bc+→J/ψπ+ decay mode
Author: LHCb Collaboration
Garrido Beltrán, Lluís
Gascón Fora, David
Graciani Díaz, Ricardo
Graugés Pous, Eugeni
Marin Benito, Carla
Picatoste Olloqui, Eduardo
Rives Molina, Vicente José
Ruiz, Hugo
Keywords: Hadrons
Gran Col·lisionador d'Hadrons
Física de partícules
Large Hadron Collider (France and Switzerland)
Particle physics
Issue Date: 6-Mar-2015
Publisher: Elsevier B.V.
Abstract: The difference in total widths between the B+ c and B+ mesons is measured using a data sample corresponding to an integrated luminosity of 3.0 fb−1 collected by the LHCb experiment in 7 and 8 TeV centre-of-mass energy proton-proton collisions at the LHC. Through the study of the time evolution of B+ c → J/ψπ+ and B+ → J/ψK+ decays, the width difference is measured to be ≡ B+ c − B+ = 4.46 ± 0.14 ± 0.07 mm−1 c, where the first uncertainty is statistical and the second systematic. The known lifetime of the B+ meson is used to convert this to a precise measurement of the B+ c lifetime, τB+ c = 513.4 ± 11.0 ± 5.7 fs, where the first uncertainty is statistical and the second is systematic.
Note: Reproducció del document publicat a:
It is part of: Physics Letters B, 2015, vol. 742, p. 1-9
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ISSN: 0370-2693
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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