Speaker
Description
High energy inclusive processes are naturally formulated in terms of partonic distributions, but in fact all exclusive processes correepond to resonances and completeness of states requires a non-trivial relation betwenn inclusive and exclusive measurements. We review how Quark-Hadron Duality (QHD) for (u,d) flavors at high energies and in the scaling regime suggests a radial and angular behaviour of mesonic and baryonic resonance masses of the Regge form M2nJ=μ2n+β2J+M20. The radial mass dependence is asymptotically consistent with a common two-body dynamics for mesons and baryons in terms of the quark-antiquark (qq¯) and quark-diquark (qD) degrees of freedom, respectively. This formula is validated phenomenologically within an uncertainty determined by half the width of the resonances, With this error prescription we find from the non-strange PDG hadrons different radial slopes μ2q¯q=1.34(4)GeV2 and μ2qD=0.75(3)GeV2, but similar angular slopes β2q¯q∼β2qD∼1.15GeV2.
