$$α_S$$ from non-strange hadronic $$τ$$ decays

Journal Article · Mon Jul 22 00:00:00 EDT 2019 · PoS - Proceedings of Science

DOI:https://doi.org/10.22323/1.365.0018· OSTI ID:1594613

Peris, Santiago ^[1]; Boito, Diogo ^[2]; Golterman, Maarten ^[3]; Maltman, Kim ^[4]

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1. Univ. Autònoma de Barcelona (Spain)
2. Univ. Sao Paulo (Brazil)
3. San Francisco State Univ., CA (United States)
4. York Univ., Toronto, ON (Canada); Univ. of Adelaide, SA (Australia)

We review how the current precision attained in the extraction of $$α_s(m_τ)$$ from hadronic $$τ$$ decays requires the inclusion of Duality Violations (DVs) in the analysis, even though these decays are largely dominated by perturbation theory. A weighted average using the OPAL and ALEPH experimental data yields $$αs(m_Z) =$$ 0.1165$$±$$0.0012 and $$αs(m_Z) =$$ 0.1185$$±$$0.0015 in fixed-orderand contour-improved perturbation theory, respectively.

• Research Organization: San Francisco State Univ., CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP); São Paulo Research Foundation (Fapesp); Brazilian National Council for Scientific and Technological Development (CNPq); Natural Sciences and Engineering Research Council of Canada (NSERC)
• Grant/Contract Number: SC0013682; 2015/20689-9; 305431/2015-3; CICYTFEDER-FPA2014-55613-P; 2014-SGR-1450
• OSTI ID: 1594613
• Journal Information: PoS - Proceedings of Science, Vol. 365; ISSN 1824-8039
• Publisher: SISSA
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS