Direct determination of Wilson coefficients using B 0 → K ∗0 μ + μ − decays

• Main Authors: T. Hurth, C. Langenbruch, F. Mahmoudi
• Format: Article
• Language: English
• Published: SpringerOpen 2017-11-01
• Series: Journal of High Energy Physics
• Subjects: B physics; Flavour Changing Neutral Currents; Hadron-Hadron scattering (experiments); Rare decay
• Online Access: http://link.springer.com/article/10.1007/JHEP11(2017)176

Abstract A method to directly determine the Wilson coefficients for rare b → s transitions using B 0 → K ∗0 μ + μ − decays in an unbinned maximum likelihood fit is presented. The method has several advantages compared to the conventional determination of the Wilson coefficients from angular observables that are determined in bins of q 2, the square of the mass of the dimuon system. The method uses all experimental information in a more efficient way and automatically accounts for experimental correlations. Performing pseudoexperiments, we show the improved sensitivity of the proposed method for the Wilson coefficients. We also demonstrate that it will be possible to use the method with the combined Run 1 and 2 data sample taken by the LHCb experiment.