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Vector leptoquark resolution of $R_K$ and $R_{D^{(*)}}$ puzzles
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abstract
We propose that three recent anomalies in $B$ meson decays, $R_{D^{(*)}}$, $R_K$, and $P_5'$, might be explained by a single vector leptoquark weak triplet state. The constraints on the parameter space are obtained by considering $t \to b \tau^+ \nu$ data, lepton flavor universality tests in the kaon sector, bounds on $B \to K^{(*)} \bar \nu \nu$, bound on the lepton flavor violating decay $B \to K \mu \tau$, and measurements of $b \to c \mu^- \bar\nu$ decays. The presence of such vector leptoquark could be exposed in precise measurements of $t \to b \tau \nu$ and $B \to K^{(*)} \bar \nu \nu$ decays. The model also predicts approximate equality of lepton flavor universality ratios $R_{K^*}$, $R_{K}$, and suppressed branching fraction of $B_s \to \mu^+ \mu^-$.
Forward citations
Cited by 3 Pith papers
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A Comprehensive Search for Leptoquarks Decaying into Top-$\tau$ Final States at the Future LHC
Simulated ML-based search strategy for third-generation scalar leptoquarks decaying to top-tau pairs could extend the LHC exclusion reach to about 1.77 TeV at 500 fb^-1.
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Probing Light Dark Fermions in $B \to D^{(*)}\ell X_{\rm inv}$ via Rate Distributions
Massive dark fermions modify rate distributions in B to D(*) lepton invisible decays within weak effective theory, affecting |V_cb| extraction.
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Probing $B^+ \to K^+$ semi-leptonic FCNC decay with new physics effects under PQCD approach
An improved PQCD plus lattice calculation of B to K semileptonic FCNC form factors confirms a 2.7 sigma excess in B+ to K+ nu nubar and a deficit in B+ to K+ l+ l-, and rules out single-leptoquark explanations using B...
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