Binosi, DanieleMezrag, CédricPapavassiliou, J.Roberts, Craig D.Rodríguez Quintero, José2019-03-122019-03-122017-09Daniele Binosi, Cédric Mezrag, Joannis Papavassiliou, Craig D. Roberts, José Rodríguez Quintero. Process-independent strong running coupling. Physical Review D 96, 25 September 2017. ISSN: 2470-0010. DOI:https://doi.org/10.1103/PhysRevD.96.0540262470-0010http://hdl.handle.net/10272/16068We unify two widely different approaches to understanding the infrared behaviour of quantum chromodynamics (QCD), one essentially phenomenological, based on data, and the other computa- tional, realised via quantum field equations in the continuum theory. Using the latter, we explain and calculate a process-independent running-coupling for QCD, a new type of effective charge that is an analogue of the Gell-Mann–Low effective coupling in quantum electrodynamics. The result is almost identical to the process-dependent effective charge defined via the Bjorken sum rule, which provides one of the most basic constraints on our knowledge of nucleon spin structure. This re- veals the Bjorken sum to be a near direct means by which to gain empirical insight into QCD’s Gell-Mann–Low effective charge.engAtribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/Process-independentRunning couplingjournal articlehttps://doi.org/10.1103/PhysRevD.96.054026open access