Combined explanation of W -mass, muon g-2, RK (∗) and RD (∗) anomalies in a singlet-triplet scalar leptoquark model

Abstract

In addition to the long-standing anomalies seen in the muon g-2, RK(∗), and RD(∗) observables by various independent experiments, the CDF Collaboration has found another significant one in the W-boson mass. These anomalies might be intertwined at a fundamental level and have a single new-physics explanation. In this paper, we present a simultaneous solution to these anomalies with two scalar leptoquarks of roughly equal mass - one a weak-singlet S1 and the other a weak-triplet S3 - which mix through a Higgs portal. The solution has only a few new couplings and TeV-scale leptoquarks, making the solution testable at the LHC. We put a lower and upper bound on the leptoquark masses in this setup from the current LHC data and the assumption that all new couplings are within the perturbative limit.