The f_(D_s) Puzzle
classification
✦ hep-ph
hep-exhep-lat
keywords
latticemeasurementsmodelsigmastandardaroundaspectbranching
read the original abstract
Recent measurements of the branching fraction for D_s -> l nu disagree with the Standard Model by around 2sigma. In this case the key aspect of the Standard Model is the calculation of the decay constant, f_{D_s}, with lattice QCD. This talk surveys the experimental measurements, and explains how the lattice QCD calculations are done. Should the discrepancy strengthen again (it was earlier 3.8sigma), it would be a signal of new physics. Models that could explain such an effect are also discussed.
This paper has not been read by Pith yet.
discussion (0)
Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.