6533b86dfe1ef96bd12ca0d8
RESEARCH PRODUCT
V-us and m(s) from hadronic tau decays
Antonio PichElvira GamizFelix SharipovJoaquim PradesMatthias Jaminsubject
High Energy Physics - Experiment (hep-ex)High Energy Physics - PhenomenologyHigh Energy Physics - LatticeHigh Energy Physics - Phenomenology (hep-ph)High Energy Physics::PhenomenologyHigh Energy Physics - Lattice (hep-lat)FOS: Physical sciencesFísicaHigh Energy Physics::ExperimentNuclear ExperimentHigh Energy Physics - ExperimentParticle Physics - Phenomenologydescription
Recent progress in the determination of |V_us| employing strange hadronic tau-decay data are reported. This includes using the recent OPAL update of the strange spectral function, as well as augmenting the dimension-two perturbative contribution with the recently calculated order alpha_s^3 term on the theory side. These updates result in |V_us| = 0.2220 +- 0.0033, with the uncertainty presently being dominated by experiment, and already being competitive with the standard extraction from K_e3 decays and other new proposals to determine |V_us|. In view of the ongoing work to analyse tau-decay data at the B-factories BaBar and Belle, as well as future results from BESIII, the error on |V_us| from tau decays is expected to be much reduced in the near future.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2006-12-12 |