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Universality of the Collins-Soper-Sterman nonperturbative function in gauge boson production

Anton V. Konychev·Pavel M. Nadolsky
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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.

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Anton V. Konychev, Pavel M. Nadolsky. 2006-01-11. Universality of the Collins-Soper-Sterman nonperturbative function in gauge boson production. https://doi.org/10.1016/j.physletb.2005.12.063

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