19-23 October 2026
Puebla
Mexico/General timezone
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Contribution Poster

Edificio Carolino - Salón de Proyecciones

Long-distance QED corrections in inclusive hadronic tau decays

Speakers

  • Mr. João Pedro DALPINO DIAS

Primary authors

Abstract

Inclusive hadronic tau decays, $\tau^- \to \text{hadrons} + \nu_\tau$, are well described by QCD and are a valuable source of information about the theory and its fundamental parameters, such as the strong coupling, $\alpha_s$. The extraction of the strong coupling from inclusive tau decays using Finite Energy Sum Rules (FESRs) is one of the most precise methods for determining this key parameter of the Standard Model. At this level of precision, the inclusion of subdominant effects, such as long-distance QED corrections, is essential. However, these electromagnetic corrections are not consistently included in current determinations of $\alpha_s$. In this work, we calculate the long-distance QED corrections to inclusive hadronic tau decays, establishing the theoretical framework for their inclusion in future FESR analyses.