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

Abstract

The calibration and performance of the opposite-side 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/psi K+, B0 -> J/psi K*0 and B0 -> D*- mu+ nu_mu decay modes with 0.37 fb^-1 of data collected in pp collisions at sqrt(s) = 7 TeV during the 2011 physics run. The opposite-side tagging power is determined in the B+ -> J/psi K+ channel to be (2.10 +- 0.08 +- 0.24) %, where the first uncertainty is statistical and the second is systematic.

arXiv comment22 pages, 9 figures, Submitted to Eur. Phys. J. C

References in corpus (4)

• sPlot: a statistical tool to unfold data distributions
• Measurement of the CP-violating phase phi_s in the decay Bs->J/psi phi
• Measurement of the B^0_s - \bar{B}^0_s oscillation frequency Delta m_s in B^0_s -> D_s^-(3) pi decays
• Measurement of Bd mixing using opposite-side flavor tagging

Cited by in corpus (41)

• Performance of the LHCb RICH detector at the LHC
• Implications of LHCb measurements and future prospects
• $\Delta M_s$ theory precision confronts flavour anomalies
• Measurement of CP violation and the B_s^0 meson decay width difference with B_s^0\to J/ψK^+ K^- and B_s^0\to J/ψπ^+π^- decays
• Precision measurement of the $B_s^0$-${\bar{B}}_s^0$ oscillation frequency with the decay $B^{0}_{s}\rightarrowD^{-}_{s}π^{+}$
• Measurement of the CP-violating phase ${\varphi }_s$ in ${\overline{B}}_s^0\to J/\psi {\pi }^{+}{\pi }^{-}$ decays
• Measurement of the CP-violating phase $\beta$ in $B^0\to J/\psi {\pi }^{+}{\pi }^{-}$ decays and limits on penguin effects
• Measurement of $CP$ violation in $B^0\to J/\psi K_S^0$ decays
• First measurement of time-dependent CP violation in Bs -> K+K- decays
• Updated measurement of time-dependent $CP$-violating observables in $B_s^0\to J/\psi K^{+}{K}^{-}$ decays
• Measurement of the CP-violating phase ${\varphi }_s$ in ${\bar{B}}_s^0\to D_s^{+}{D}_s^{-}$ decays
• First study of the CP-violating phase and decay-width difference in $B_s^0\to \psi (2S)\varphi$ decays
• The CKM Parameters
• Measurement of $CP$ asymmetries in two-body $B_{(s)}^0$-meson decays to charged pions and kaons
• Measurement of the $CP$ asymmetry in $B_s^0-\overline{B}{}_s^0$ mixing
• Resonances and $CP$ violation in $B_s^0$ and ${\overline{B}}_s^0\to J/\psi K^{+}{K}^{-}$ decays in the mass region above the $\varphi (1020)$
• A precise measurement of the $B^0$ meson oscillation frequency
• First measurement of the CP-violating phase in $B_s^0\to \varphi \varphi$ decays
• $B$ flavour tagging using charm decays at the LHCb experiment
• Precise determination of the B0s-B0sbar oscillation frequency
• CP violation in the B system
• Measurement of $CP$-violating and mixing-induced observables in $B_s^0\to \varphi \gamma$ decays
• Measurement of the $B^0$--${\bar{B}}^0$ oscillation frequency $\Delta m_d$ with the decays $B^0\to D^{-}{\pi }^{+}$ and $B^0\to J/\psi K^{\ast 0}$
• A new algorithm for identifying the flavour of $B_s^0$ mesons at LHCb
• Measurement of the time-dependent CP asymmetry in B0 -> J/ψ KS0 decays
• Time-dependent Dalitz-plot formalism for B_q -> J/ψ h+ h-
• Measurement of the time-dependent CP asymmetries in $B_s^0\to J/\psi K_{\mathrm{S}}^0$
• Observation of $B_s^0$-${\bar{B}}_s^0$ mixing and measurement of mixing frequencies using semileptonic B decays
• Measurement of the $CP$-violating phase ${\varphi }_s$ from $B_s^0\to J/\psi {\pi }^{+}{\pi }^{-}$ decays in 13 TeV $pp$ collisions
• New algorithms for identifying the flavour of $B^0$ mesons using pions and protons
• Measurement of CP violation in $B^0\to \psi (\to {\ell }^{+}{\ell }^{-})K_S^0(\to {\pi }^{+}{\pi }^{-})$ decays
• Measurement of $CP$ violation in $B^0\to D^{+}{D}^{-}$ decays
• Heavy Flavour Physics at the LHC
• Improved measurement of $CP$ violation parameters in $B_s^0\to J/\psi K^{+}{K}^{-}$ decays in the vicinity of the $\varphi (1020)$ resonance
• Precision measurement of $CP$ violation in the penguin-mediated decay $B_s^0\to \varphi \varphi$
• Review of real-time data processing for collider experiments
• First measurement of time-dependent $CP$ violation in the flavor-changing neutral-current decay $B^0\to K_S^0{\mu }^{+}{\mu }^{-}$
• Visualisation of $CP$-violation effects in decay-time-dependent analyses of multibody $B$-meson decays
• Observation of $CP$ violation in $B^0\to J/\psi \rho (770{)}^0$ decays
• Minimising Event Size, Maximising Physics: Inclusive Particle Isolation for LHCb's Run 3
• Unlocking time-dependent $CP$ violation without signal vertexing at $B$ factories