Tau-decay determination of the strong coupling

2018/11/25 by Antonio Pich, Pich, Antonio
Chemistry · Physics and Astronomy · #Advanced NMR Techniques and Applications #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.1811.10067

openalex publication_date 2018/11/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We review the current status of the determination of the strong coupling from tau decay. Using the most recent release of the ALEPH data, a very comprehensive phenomenological analysis has been performed, exploring all strategies previously considered in the literature and several complementary approaches. Once their actual uncertainties are properly assessed, the results from all adopted methodologies are in excellent agreement, leading to a very robust and reliable value of the strong coupling, α_s^(n_f=3)(m_τ²) = 0.328± 0.013, which implies α_s^(n_f=5)(M_Z²) = 0.1197± 0.0015.

Related

• The strong coupling from tau decays without prejudice
• Tau Decay Determination of the QCD Coupling
• α_s from the updated ALEPH data for hadronic τ decays
• On the Extraction of the Strong Coupling from Hadronic Tau Decay
• The status of the strong coupling from tau decays in 2016