CP Violation in B ? Kl+l- Decays: New Opportunities in the High-Precision Era

Robert Fleischer, Eleftheria Malami, Anders Rehult, K. Keri Vos

Research output: Contribution to journalConference article in journalAcademicpeer-review

Abstract

Experimental data on rare B-meson decays indicate deviations from Standard Model predictions. In studies of these decays, new sources of CP violation are often neglected. We discuss CP violation in the rare B-meson decays B ? Kl+l-(l = µ, e) and point to two phenomena that arise when new sources of CP violation are included. First, the Wilson coefficients C9l and C10l become complex, and we show how we can extract their values from measurements of direct and mixing-induced CP asymmetries. Second, new sources of CP violation can generate nontrivial lepton flavour universality violation. Such violation is usually measured through ratios like RK and RK*, but we show that measuring only these ratios leaves a large parameter space unexplored. These results bring exciting opportunities to reveal New Physics effects in the high-precision era.
Original languageEnglish
Article number128
JournalP o S - Proceedings of Science
Volume463
Publication statusPublished - 31 Jul 2024
EventCorfu Summer Institute 2023: 23rd Hellenic School and Workshops on Elementary Particle Physics and Gravity - Corfu, Greece
Duration: 27 Aug 20231 Oct 2023

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