Impact of a non-universal Z^′ on the B→ K^(*)l⁺l^- and B → K^(*)νν processes

2023/01/13 by Bednyakov, A. V., Mukhaeva, A. I.
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2302.03002

Abstract

We perform a study of the new physics effects in semileptonic FCNC processes within a low-energy approximation of the anomaly-free supersymmetic extension of the SM with additional Z' vector field. The key feature of the model is the non-diagonal structure of Z' couplings to fermions, which is parameterized by few new-physics parameters in addition to well-known mixing matrices for quarks and leptons in the SM. We not only consider CP-conserving scenarios with real parameters, but also account for possible CP violation due to new physical weak phases. We analyse the dependence of the b→ s observables on the parameters together with correlations between the observables predicted in the model. Special attention is paid to possible enhancement of B → K^(*) νν rates and to CP-odd angular observables in B → K^* ll decays.

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