A light dimuon resonance in B decays?
Abstract
The observed deviations from the Standard Model in several b -> s mu mu processes can be explained in terms of a new vector boson produced on-shell in B meson decays. A mass of 2.5-3 GeV and a total width of 10-20% allow to hide the associated dimuon bump in the poorly known charmonium region, and the large invisible decay width can be interpreted in terms of Dark Matter. This proposal predicts a contribution to the muon anomalous magnetic moment, that could explain the long-standing tension with the Standard Model. It also predicts sizeable invisible B decays and a peculiar q^2-dependence of the lepton flavor universality ratios R_K and R_K* , that could be tested at the LHCb and Belle-II. This proceeding is based on arXiv:1704.06188, and slightly extends it with comments about Dark Matter.
Cite
@article{arxiv.1809.11061,
title = {A light dimuon resonance in B decays?},
author = {Filippo Sala},
journal= {arXiv preprint arXiv:1809.11061},
year = {2018}
}
Comments
4 pages, 2 figures, contribution to the proceedings of the conference FPCapri2018 based on arXiv:1704.06188. v2: reference added