Opposite-side flavour tagging of B mesons at the LHCb experiment

R Aaij, J.F.J. van den Brand, F. Dettori, T.J. Ketel, R. Koopman, R.W. Lambert, M.H.M. Merk, H.G. Raven, M. Schiller, Collaboration LHCb

Research output: Contribution to JournalArticleAcademicpeer-review


The calibration and performance of the opposites-ide flavour tagging algorithms used for the measurements of time-dependent asymmetries at the LHCb experiment are described. The algorithms have been developed using simulated events and optimized and calibrated with B+ → J/ψ K+, B0 →J/ψK*0 and B0 →D* μ + ν<inf>μ</inf> decay modes with 0.37 fb−1 of data collected in pp collisions at √s = 7 TeV during the 2011 physics run. The opposite-side tagging power is determined in the B+ → J/ψ K + channel to be (2.10 ± 0.08 ± 0.24) %, where the first uncertainty is statistical and the second is systematic.
Original languageEnglish
Article number2022
JournalEuropean Physical Journal C. Particles and Fields
Issue number6
Publication statusPublished - 2012


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