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Constraints on Regge models from perturbation theory · Around

2007

Constraints on Regge models from perturbation theory

Mondejar, Jorge, Pineda, Antonio

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We study the constraints that the operator product expansion imposes on large $N_c$ 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.

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