Non-perturbative effects in the W and Z transverse momentum distribution

Details Non-perturbative effects in the W and Z transverse momentum distribution Non-perturbative effects in the W and Z transverse momentum distribution

2000-07-18

arxiv.org/abs/hep-ph/0007190v1

JHEP 0010:025,2000

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 3 figures

Scientific paper

10.1088/1126-6708/2000/10/025

We use the "dispersive method" to investigate non-perturbative effects in the transverse momentum distribution of vector bosons produced in p-pbar collisions. The assumption of a non-perturbative modification to the running coupling at low scales leads to additional contributions in impact parameter space proportional to -b^2 log Q^2 and -b^2. Our results, which we expect to be valid provided tau is not close to 1, are shown to account for a substantial proportion of the total non-perturbative contribution extracted from data.

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