Renormalization-group evolution of new physics contributions to (semi)leptonic meson decays

• DOI: 10.1016/j.physletb.2017.07.003
• Publication Date: 2017-07-08T08:49:13Z
• Authors: Martín González-A...; Jorge Martin Cama...; Kin Mimouni
• Keywords: B meson; Operator (biology); Electroweak scale

We study the renormalization group evolution (RGE) of new physics contributions to (semi)leptonic charged-current meson decays, focusing on operators involving a chirality flip at quark level. calculate their under electroweak and electromagnetic interactions, including also three-loop QCD running provide numerical formulas that allow us connect values corresponding Wilson coefficients from scales TeV low-energy scales. The large mixing tensor operator into (pseudo)scalar ones has important phenomenological implications, such as RGE bounds obtained light decays or in $b\to c\ell\nu$ transitions. For instance, we scenarios effective operators, which have been proposed literature address $B$-decay anomalies, most notably those concerning $R_{D^{(*)}}$ ratios. conclude loop effects are should be taken account analysis these processes, especially if generated an energy scale $\sim 1$ higher.