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000476534 0247_ $$2arXiv$$aarXiv:2203.08271
000476534 0247_ $$2datacite_doi$$a10.3204/PUBDB-2022-01776
000476534 037__ $$aPUBDB-2022-01776
000476534 041__ $$aEnglish
000476534 088__ $$2arXiv$$aarXiv:2203.08271
000476534 088__ $$2Fermilab$$aFERMILAB-CONF-22-148-T
000476534 1001_ $$0D.G.d.Enterria.1$$ad'Enterria, D.$$b0$$eCorresponding author
000476534 245__ $$aThe strong coupling constant: State of the art and the decade ahead
000476534 260__ $$c2022
000476534 300__ $$a130
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000476534 500__ $$a130 pages, 82 figures. White paper submitted to the Energy Frontier 'Proceedings of the US Community Study on the Future of Particle Physics' (Snowmass 2021)
000476534 520__ $$aThis document provides a comprehensive summary of the state-of-the-art, challenges, and prospects in the experimental and theoretical study of the strong coupling $\alpha_s$. The current status of the seven methods presently used to determine $\alpha_s$ based on: (i) lattice QCD, (ii) hadronic $\tau$ decays, (iii) deep-inelastic scattering and parton distribution functions fits, (iv) electroweak boson decays, hadronic final-states in (v) e+e-, (vi) e-p, and (vii) p-p collisions, and (viii) quarkonia decays and masses, are reviewed. Novel $\alpha_s$ determinations are discussed, as well as the averaging method used to obtain the PDG world-average value at the reference Z boson mass scale, $\alpha_s(m^2_Z)$. Each of the extraction methods proposed provides a 'wish list' of experimental and theoretical developments required in order to achieve an ideal permille precision on $\alpha_s(m^2_Z)$ within the next 10 years.
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