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HFLAV $τ$ branching fractions fit and measurements of Vus with $τ$ lepton data
by Alberto Lusiani
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Submission summary
| Authors (as registered SciPost users): | Alberto Lusiani |
| Submission information | |
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| Preprint Link: | https://arxiv.org/abs/1811.06470v2 (pdf) |
| Date accepted: | 2019-01-17 |
| Date submitted: | 2018-12-17 01:00 |
| Submitted by: | Lusiani, Alberto |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | The 15th International Workshop on Tau Lepton Physics (TAU2018) |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approach: | Experimental |
Abstract
We report the status of the Heavy Flavour Averaging Group (HFLAV) averages of the $\tau$ lepton measurements We then update the latest published HFLAV global fit of the $\tau$ lepton branching fractions (Spring 2017) with recent results by BABAR. We use the fit results to update the Cabibbo-Kobayashi-Maskawa (CKM) matrix element Vus measurements with the $\tau$ branching fractions. We combine the direct $\tau$ branching fraction measurements with indirect predictions using kaon branching fractions measurements to improve the determination of Vus using $\tau$ branching fractions. The Vus determinations based on the inclusive branching fraction of $\tau$ to strange final states are about $3\sigma$ lower than the Vus determination from the CKM matrix unitarity.
Author comments upon resubmission
"References: blank space is missing between the journal and the volume"
I checked the bibliography references and found that there are spaces between the journal and volume numbers. I am using the SciPost bibliography style, which uses the common convention that for journals like Phys.Rev.D the "D" is attached to the volume number. I think that that should stay so for SciPost proceedings.
List of changes
Two typos fixed.
Results on τ→K/π(n)π0ντ are now all with 3 decimal places.
Revision from ""is superseded" to "has been superseded"
Published as SciPost Phys. Proc. 1, 001 (2019)