The NLO time-like rho meson electromagnetic form factors are obtained by analytic continuation of space-like NLO results, with twist-3 contributions dominating and predictions consistent with BABAR.
Rho-meson form factors and QCD sum rules
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We present predictions for rho-meson form factors obtained from the analysis of QCD sum rules in next-to-leading order of perturbation theory. The radiative corrections turn out to be sizeable and should be taken into account in rigorous theoretical analysis.
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Next-to-leading-order time-like rho electromagnetic form factors in ${k_{\rm T}}$ factorization
The NLO time-like rho meson electromagnetic form factors are obtained by analytic continuation of space-like NLO results, with twist-3 contributions dominating and predictions consistent with BABAR.