Measurement of the lifetime of the Bc+ meson using the Bc+→J/ψπ+ decay mode
- R. Aaij,
- B. Adeva,
- M. Adinolfi,
- A. Affolder,
- Z. Ajaltouni,
- S. Akar
- National Institute for Subatomic Physics,
- University of Santiago de Compostela,
- University of Bristol,
- University of Liverpool,
- Université Clermont Auvergne,
- CNRS
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Abstract
The difference in total widths between the Bc+ and B +mesons is measured using a data sample corresponding to an integrated luminosity of 3.0 fb -1collected 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 Bc+→J/ψπ+ and B +→J/ψK +decays, the width difference is measured to beδΓ≡ΓBc+-ΓB+=4.46±0.14±0.07mm-1c, 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 Bc+ lifetime,τBc+=513.4±11.0±5.7fs, where the first uncertainty is statistical and the second is systematic.
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Original language
EnglishPages from-to (Number of pages)
Pages 29-37 (9 pages)Journal (Volume, Issue Number)
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics (Volume 742)Publication milestones
- Published - 06/03/2015
Publication status
ISSN
0370-2693Publication IDs
- Scopus: 84937644656
- WOS: 000350555900006