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Testing QCD with hypothetical tau leptons

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dc.contributor.authorBrodsky, S. J
dc.contributor.authorPeláez Sagredo, José Ramón
dc.contributor.authorToumbas, N.
dc.date.accessioned2023-06-20T20:13:25Z
dc.date.available2023-06-20T20:13:25Z
dc.date.issued1999-08-01
dc.description©1999 The American Physical Society.
dc.description.abstractWe construct new phenomenological tests of perturbative QCD by considering a hypothetical au lepton of arbitrary mass which decays hadronically through the electromagnetic current. Its adronic branching ratio can be computed directly as an integral over the e⁺e⁻ annihilation cross section ratio, R_ (e⁺e⁻). More generally, we can design a set of commensurate scale relations which test the applicability and self-consistency of leading twist QCD predictions by varying the weight function away from the form associated with the V-A decay of the physical τ . This method allows the wide range of R_(e⁺e⁻) data (or other similar observables which define an effective charge) to be used as renormalization scheme and scale invariant probes of QCD. [S0556-2821(99)05713-6].
dc.description.departmentDepto. de Física Teórica
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/35682
dc.identifier.doi10.1103/PhysRevD.60.037501
dc.identifier.issn1550-7998
dc.identifier.officialurlhttp://dx.doi.org/10.1103/PhysRevD.60.037501
dc.identifier.relatedurlhttp://journals.aps.org
dc.identifier.urihttps://hdl.handle.net/20.500.14352/59879
dc.issue.number3
dc.journal.titlePhysical review D
dc.language.isoeng
dc.publisherAmer Physical Soc
dc.rights.accessRightsopen access
dc.subject.cdu51-73
dc.subject.keywordTotal cross-section
dc.subject.keywordInclusive muon production
dc.subject.keywordPion form-factor
dc.subject.keywordCm energy-range
dc.subject.keywordSquare- root-S
dc.subject.keywordE+E annihilation
dc.subject.keywordSum-rules
dc.subject.keywordRenormalization-scheme
dc.subject.keywordSpectral functions
dc.subject.keywordHadron-production
dc.subject.ucmFísica-Modelos matemáticos
dc.subject.ucmFísica matemática
dc.titleTesting QCD with hypothetical tau leptons
dc.typejournal article
dc.volume.number60
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