An explicit Z′-boson explanation of the B → K∗μ+μ− anomaly

By R. Gauld, Florian Goertz, U. Haisch. 2013

184 citations recorded by the source corpus.

A bstractA 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 → Xsν$ \overline{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.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/3a00d56d575b51fd617fc5bdf7540b1f8f35d25b

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In Nuclear and High Energy Physics

Citations in the corpus

331 models facing new b → sμ+μ− data (2013, methodology): “Unfortunately this model has several problems, in particular in the MFV limit considered in [14], which in our view eliminates it as a valid description of the present flavour data.”
Test of lepton universality using b+ → K+ℓ+ℓ- decays. (2014, unknown): “Models that contain a Z ′ boson have recently been proposed to explain measurements of the angular distribution and branching fractions of B→ K∗0μ+μ− and B→ K+μ+μ− decays [8].”