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Updated determinations of |V$_{us}$| with tau decays using new recent estimates of radiative corrections for light-meson leptonic decay rates

by Alberto Lusiani

Submission summary

As Contributors: Alberto Lusiani
Arxiv Link: (pdf)
Date submitted: 2022-02-22 21:02
Submitted by: Lusiani, Alberto
Submitted to: SciPost Physics Proceedings
Proceedings issue: 16th International Workshop on Tau Lepton Physics (TAU2021)
Academic field: Physics
  • High-Energy Physics - Phenomenology
Approaches: Theoretical, Experimental, Phenomenological


We update the |V$_{us}$| determinations using the HFLAV 2018 report tau branching fraction results with recent new estimates of the $\pi\ell2$ and $K\ell2$ radiative corrections. There are minor changes of the central values and uncertainties.

Current status:
Editor-in-charge assigned

Submission & Refereeing History

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Submission 2201.03272v2 on 22 February 2022

Reports on this Submission

Anonymous Report 1 on 2022-3-10 (Invited Report)


The manuscript presents a relevant update of the $V_{us}$ determination from exclusive tau decays. I recommend its publication at SciPost after the author has considered implementing the few minor comments/suggestions described below.
I don't need to see the manuscript again.

Requested changes

1- The second formula in page 2 contains a funny character "$\hbar$". It should be a typo.

2- The $\delta R_{\tau/P}$ corrections displayed in the third formula of page 2 have been recently re-evaluated in 2107.04603, 2112.01859, where slightly larger errors are claimed. This is worth mentioning and showing how numbers change.

3- The table in page 3 displays also the average with the inclusive determination (last row), but this is not clear neither from the table caption nor from the text, where one only mentions "all three determinations" (which ones?). A reference to the inclusive method could also be appropriate.

  • validity: high
  • significance: good
  • originality: -
  • clarity: -
  • formatting: -
  • grammar: -

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