March 3, 2026Open Access

Lepton Flavour Universality tests and determination of |Vₔₒ| using the HFLAV-Tau branching fractions fit

Key Points

Lepton flavour universality tests show significant updates using the latest HFLAV-Tau global fit.
The CKM matrix element |Vus| is determined more accurately through rigorous statistical analysis.
Observational analysis incorporates next-to-leading-order quantum electrodynamics corrections for improved tests.
This work highlights the need for precision in particle physics measurements, supporting ongoing investigations.

Abstract

We present an update of the lepton flavour universality (LFU) tests and of the determination of the CKM matrix element using the latest HFLAV-Tau global fit of branching fractions. The fit accounts for correlations and dependencies on common external inputs. We investigate the impact of using next-to-leading-order QED corrections in the LFU tests.

Connected Papers

Building similarity graph...

Analyzing shared references across papers

Discussion

Authors

Alberto Lusiani

HFLAV-Tau group

Actions

References and Citations

Connected Papers

Building similarity graph...

Analyzing shared references across papers

Lepton Flavour Universality tests and determination of |Vₔₒ| using the HFLAV-Tau branching fractions fit

Key Points

Abstract

Citation Network

Connected Papers

Discussion

Authors

Actions

References and Citations

Citation Network

Connected Papers

Discussion

Cite this study