2015/05/08 by Crivellin, Andreas, D'Ambrosio, Giancarlo, Heeck, Julian
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph)
paper · doi:10.48550/arxiv.1505.02026
The LHC observed deviations from the Standard Model (SM) in the flavour sector: LHCb found a 4.3 σ discrepancy compared to the SM in b→ sμμ transitions and CMS reported a non-zero measurement of h→μτ with a significance of 2.4 σ. Here we discuss how these deviations from the SM can be explained, focusing on two models with gauged Lμ-Lτ symmetry. The first model contains two scalar doublets and vector-like quarks while the second one employs three scalar doublets but does not require vector-like fermions. In both models, interesting correlations between b→ sμμ transitions, h→μτ, and τ→3μ arise.