RT Journal Article
T1 Testing QCD with hypothetical tau leptons
A1 Brodsky, S. J
A1 Peláez Sagredo, José Ramón
A1 Toumbas, N.
AB We 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].
PB Amer Physical Soc
SN 1550-7998
YR 1999
FD 1999-08-01
LK https://hdl.handle.net/20.500.14352/59879
UL https://hdl.handle.net/20.500.14352/59879
LA eng
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