PoS - Proceedings of Science
Volume 280 - Flavor Physics and CP Violation (FPCP2016) - Tuesday 4
Determinations of V_us from Hadronic τ Decay Data
K. Maltman*, R.J. Hudspith, R. Lewis, T. Izubuchi, H. Ohki and J. Zanotti
Full text: pdf
Published on: January 12, 2017
Abstract
The current status of determinations of V_us from exclusive
and inclusive hadronic $\tau$ decay data is reviewed. In the case of the inclusive determinations, we describe
(i) recent progress on the implementation of the conventional flavor-breaking sum rule approach and (ii) a new dispersive approach in which lattice data, rather than the OPE, is used as theory input and only the inclusive strange experimental distribution is required. The former provides a resolution of the long-standing puzzle of >3 sigma low values of V_us obtained from previous implementations of the flavor-breaking
sum rule approach, while the latter is shown to make possible a significant reduction in the impact of the region of larger experimental errors above s~2 GeV^2. Advantages of, and near-term prospects for, this new approach are also discussed.
DOI: https://doi.org/10.22323/1.280.0023
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.