An explicit Z (')-boson explanation of the B -> K (au) mu (+) mu (-) anomaly

Journal article

A global fit to the recent B → K* μ + μ - data shows indications for a large new-physics contribution to the Wilson coefficient of the semi-leptonic vector operator. In this article we consider a simple Z′-boson model of 3-3-1 type that can accommodate such an effect without violating any other constraint from quark-flavour physics. Implications for yet unobserved decay modes such as B → X s ν v and longstanding puzzles like B → πK are also discussed. The Z′-boson masses required to address the observed anomaly lie in the range of 7 TeV. Such heavy Z′ bosons evade the existing bounds from precision data and direct searches, and will remain difficult to discover even at a high-luminosity LHC. The potential of an ILC as well as the next generation of low-energy parity-violation experiments in constraining the Z′-boson parameter space is also examined. © 2014 The Author(s).

Authors: Gauld, R; Goertz, F; Haisch, U

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: Springer Berlin Heidelberg
• Journal: Journal of High Energy Physics
• Volume: 2014
• Issue: 1
• Publication date: 2014-01-01
• DOI: 10.1007/JHEP01(2014)069
• EISSN: 1029-8479
• ISSN: 1029-8479
• Keywords: Beyond Standard Model; Rare Decays; B-Physics