QED Interconnection Effects on W Momentum Distributions at LEP 2

Details QED Interconnection Effects on W Momentum Distributions at LEP 2 QED Interconnection Effects on W Momentum Distributions at LEP 2

1995-08-21

arxiv.org/abs/hep-ph/9508332v1

Z.Phys.C70:625-636,1996

Physics

High Energy Physics

High Energy Physics - Phenomenology

1+27 pages, including 23 eps figures, use uudecode and gunzip to restore original file, run LaTeX2epsilon with epsfig package,

Scientific paper

10.1007/s002880050137

The process $\ee \to \W^+\W^- \to \f_1 \fbar_2 \, \f_3 \fbar_4$ contains charges in the initial, intermediate and final stages. This gives a rich selection of possible QED interconnection effects. Coulomb interaction is the simplest of these, and can thus be used to explore consequences. We study a number of experimental observables, with emphasis on those related to the W momentum distribution. Second-order Coulomb effects are shown to be practically negligible. The limited LEP~2 statistics will not allow detailed tests, so any theory uncertainty will be reflected in the systematic error on the W mass. Currently the uncertainty from this source may be as high as 20~MeV.

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