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

Alberto Guffanti | Zendy; Graham E Smye | Zendy

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

Author(s) -

Alberto Guffanti,

Graham E Smye

Publication year - 2000

Publication title -

journal of high energy physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.998

H-Index - 261

eISSN - 1126-6708

pISSN - 1029-8479

DOI - 10.1088/1126-6708/2000/10/025

Subject(s) - physics , non perturbative , boson , transverse plane , momentum (technical analysis) , coupling (piping) , particle physics , distribution (mathematics) , quantum electrodynamics , mathematical physics , nuclear physics , mathematics , mathematical analysis , medicine , anatomy , mechanical engineering , finance , engineering , economics

We use the "dispersive method" to investigate non-perturbative effects in thetransverse momentum distribution of vector bosons produced in p-pbarcollisions. The assumption of a non-perturbative modification to the runningcoupling at low scales leads to additional contributions in impact parameterspace proportional to -b^2 log Q^2 and -b^2. Our results, which we expect to bevalid provided tau is not close to 1, are shown to account for a substantialproportion of the total non-perturbative contribution extracted from data.Comment: 18 pages, 3 figure

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