# Publications associated with Applications & Innovations

## Measurement of the ratio of branching fractions and difference in CP asymmetries of the decays B<sup>+</sup>→ J/ψπ<sup>+</sup>and B<sup>+</sup>→ J/ψK<sup>+</sup>

Journal of High Energy Physics **2017** (2017)

© 2017, The Author(s). The ratio of branching fractions and the difference in CP asymmetries of the decays B + → J/ψπ + and B + → J/ψK + are measured using a data sample of pp collisions collected by the LHCb experiment, corresponding to an integrated luminosity of 3 fb −1 at centre-of-mass energies of 7 and 8 TeV. The results are (Formula presented.) where the first uncertainties are statistical and the second are systematic. Combining this result with a recent LHCb measurement of A C P (B + → J/ ψK + ) provides the most precise estimate to date of CP violation in the decay B + → J/ψπ + , (Formula presented.).

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