2014/11/25 by LHCb collaboration, R. Aaij, B. Adeva +699 · 1 citation
Physics and Astronomy · #hep-ex
paper · pdf · doi:10.1016/j.physletb.2015.01.010
published as Physics Letters B 742 (2015) 29-37 · 19 pagers, 3 figures
arxiv created 2014/11/25 · arxiv updated 2015/01/28
The difference in total widths between the Bc+ and B+ mesons is measured using 3.0fb-1 of data 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 Bc+ → J/ψπ+ and B+→ J/ψK+ decays, the width difference is measured to be ΔΓ≡ 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 systematic.