Tests of quark-hadron duality in t -decays
Por:
Dominguez C.A., Hernandez L.A., Schilcher K., Spiesberger H.
Publicada:
1 ene 2016
Resumen:
An exhaustive number of QCD finite energy sum rules for t-decay together with the latest updated ALEPH data is used to test the assumption of global duality. Typical checks are the absence of the dimension d = 2 condensate, the equality of the gluon condensate extracted from vector or axial vector spectral functions, the Weinberg sum rules, the chiral condensates of dimensions d = 6 and d = 8, as well as the extraction of some low-energy parameters of chiral perturbation theory. Suitable pinched linear integration kernels are introduced in the sum rules in order to suppress potential quark-hadron duality violations and experimental errors. We find no compelling indications of duality violations in hadronic t-decay in the kinematic region above s 2.2 GeV2 for these kernels. © 2016 World Scientific Publishing Company.
Filiaciones:
Dominguez C.A.:
Centre for Theoretical and Mathematical Physics, And Department of Physics, University of Cape Town, Rondebosch, South Africa
National Insitute for Theoretical Physics, Private Bag X1, Matieland, South Africa
Hernandez L.A.:
Centre for Theoretical and Mathematical Physics, And Department of Physics, University of Cape Town, Rondebosch, South Africa
Schilcher K.:
Centre for Theoretical and Mathematical Physics, And Department of Physics, University of Cape Town, Rondebosch, South Africa
National Insitute for Theoretical Physics, Private Bag X1, Matieland, South Africa
PRISMA Cluster of Excellence, Institut für Physik, Johannes Gutenberg-Universität, Mainz, Germany
Spiesberger H.:
Centre for Theoretical and Mathematical Physics, And Department of Physics, University of Cape Town, Rondebosch, South Africa
PRISMA Cluster of Excellence, Institut für Physik, Johannes Gutenberg-Universität, Mainz, Germany
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