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On Light Resonance Interpretations of the B Decay Anomalies
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abstract
We sketch a novel method to search for light di-leptonic resonances by exploiting precision measurements of Drell-Yan production. Motivated by the recent hints of lepton flavour universality violation in $B \to K^{\ast} \ell^+ \ell^-$, we illustrate our proposal by studying the case of spin-1 resonances that couple to muons and have masses in the range of a few GeV. We show that the existing LHC data on $pp \to Z/\gamma^\ast \to \mu^+ \mu^-$ put non-trivial constraints on light di-muon resonance interpretations of $B$ decay anomalies in a model-independent fashion. The impact of our proposal on the long-standing discrepancy in the anomalous magnetic moment of the muon is also briefly discussed.
Forward citations
Cited by 2 Pith papers
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Constraints on Dark Photon and Dark $Z$ Model Parameters in the $B$ and $K$ Meson Decays
Only a fine-tuned dark Z model with cancelled electron couplings survives the combined constraints, but its muon g-2 contribution is orders of magnitude too large.
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Searching for neutral state in the rare decay $J/\psi \rightarrow e^+ e^- \phi$
Dark photon and dark Z contributions to J/ψ → e+e−φ are far below the experimental limit, making the channel insensitive to these mediators.
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