Testing QCD with hypothetical tau leptons
نویسندگان
چکیده
منابع مشابه
Testing QCD with Hypothetical Tau Leptons
We construct new tests of perturbative QCD by considering a hypothetical lepton of arbitrary mass, which decays hadronically through the electromagnetic current. We can explicitly compute its hadronic width ratio directly as an integral over the e+e annihilation cross section ratio, Re+e . Furthermore, we can design a set of commensurate scale relations and perturbative QCD tests by varying the...
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Inspired by the relation between the hadronic decay of the τ lepton and the e+e− annihilation into hadrons, we derive new tests of perturbative QCD. We design a set of commensurate scale relations to test the self-consistency of leading-twist QCD predictions for any observable which defines an effective charge. This method provides renormalization scheme and scale invariant probes of QCD which ...
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Model independent tests for symmetry violations in tau decays are important for determining whether the tau lepton is elementary or, instead, macroscopic. Such tests are also significant steps towards resolving the outstanding e−μ− τ puzzle. This talk reviews such tests in the context of a general treatment of two-body τ decays which only assumes Lorentz invariance and the treelike structure of...
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We review our recent works on tests of perturbative QCD, inspired by the relation between the hadronic decay of the τ lepton and the e + e − annihilation into hadrons. First, we present a set of commensurate scale relations that probe the self-consistency of leading-twist QCD predictions for any observable which defines an effective charge. These tests are independent of the renormalization sch...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 1999
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.60.037501