What can we learn from sum rules for vertex functions in QCD? |
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Authors: | NS Craigie J Stern |
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Institution: | 1. International Centre for Theoretical Physics, Trieste, Italy;2. Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, Italy |
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Abstract: | We demonstrate that the light-cone sum rules for vertex functions based on the operator product expansion and QCD perturbation theory lead to interesting relationships between various non-perturbative parameters associated with hadronic bound states (e.g. vertex couplings and decay constants). We also show that such sum rules provide a valuable means of estimating the matrix elements of the higher spin operators in the meson wave function. |
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