Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1995-06-29
Nucl.Phys. B454 (1995) 253-290
Physics
High Energy Physics
High Energy Physics - Phenomenology
37 pages, LATEX, 3 figures as uudecoded file
Scientific paper
10.1016/0550-3213(95)00439-Y
The resummed Drell-Yan cross section in the double-logarithmic approximation suffers from infrared renormalons. Their presence was interpreted as an indication for non-perturbative corrections of order $\lqcd/(Q(1-z))$. We find that, once soft gluon emission is accurately taken into account, the leading renormalon divergence in the resummed cross section is cancelled by higher-order perturbative contributions in the exponent of the resummed cross section. From this evidence, `higher twist' corrections to the hard cross section in Drell-Yan production should therefore intervene only at order $\lqcd^2/((Q^2 (1-z)^2)$ in the entire perturbative domain $Q (1-z) > \lqcd$. We compare this result with hadronic event shape variables, comment on the potential universality of non-perturbative corrections to resummed cross sections, and on possible implications for phenomenology.
Beneke Martin
Braun Vladimir M.
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