Universality of the Collins–Soper–Sterman nonperturbative function in vector boson production

By A. V. Konychev, Pavel M. Nadolsky. 2005

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Abstract We revise the b ∗ model for the Collins–Soper–Sterman resummed form factor to improve description of the leading-power contribution at nearly nonperturbative impact parameters. This revision leads to excellent agreement of the transverse momentum resummation with the data in a global analysis of Drell–Yan lepton pair and Z boson production. The nonperturbative contributions are found to follow universal quasi-linear dependence on the logarithm of the heavy boson invariant mass, which closely agrees with an estimate from the infrared renormalon analysis.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/63d82bfa751120ba8265f55eaa4370cdca565b41