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

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

2005-06-23

arxiv.org/abs/hep-ph/0506225v3

Phys.Lett. B633 (2006) 710-714

Physics

High Energy Physics

High Energy Physics - Phenomenology

published version; 14 pages, 4 figures, additional discussion

Scientific paper

10.1016/j.physletb.2005.12.063

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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