2007/04/30 by Jorge Mondejar, Jorge Mondéjar, Antonio Pineda +1
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph #hep-th #nucl-th
paper · pdf · doi:10.1088/1126-6708/2007/10/061
published as JHEP0710:061,2007 · 14 pages, 6 figures; two references added, numerical analysis extended, main conclusions unchanged
arxiv created 2007/10/10 · openalex publication_date 2007/10/16 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study the constraints that the operator product expansion imposes on large Nc inspired QCD models for current-current correlators. We focus on the constraints obtained by going beyond the leading-order parton computation. We explicitly show that, assumed a given mass spectrum: linear Regge behavior in n (the principal quantum number) plus corrections in 1/n, we can obtain the logarithmic (and constant) behavior in n of the decay constants within a systematic expansion in 1/n. Our example shows that it is possible to have different large n behavior for the vector and pseudo-vector mass spectrum and yet comply with all the constraints from the operator product expansion.