e ^{+}e ^{} → e ^{}overlinev_{e}u overlined from LEP to linear collider energies
Abstract
The complete tree level crosssection for the process e ^{+}e ^{} → e ^{}overlinev_{e}u overlined is computed using the GRACE system, a program package for automatic amplitude calculation. Special attention is brought to the gauge violation problem induced by the finite width of the Wboson. The preserved gauge scheme is introduced and an event generator including doubleresonant, singleresonant and nonresonant diagrams with no need for a cut on the electron polar angle is built. Below threshold, the single W and nonresonant diagrams give a substantial contribution to the total crosssection, at linear collider energies, the crosssection, for small electron polar angles, is simply dominated by these contributions. Since no cut needs to be applied to the electron, the generator can be used to estimate background for searches involving jets and missing energy. A monojet event rate estimation based on this process at LEPI energy is discussed.
 Publication:

Physics Letters B
 Pub Date:
 February 1995
 DOI:
 10.1016/03702693(95)00298Y
 arXiv:
 arXiv:hepph/9412215
 Bibcode:
 1995PhLB..349..367K
 Keywords:

 High Energy Physics  Phenomenology
 EPrint:
 18 pages, uses epsfig.sty, 10 postscript figures. revised for minor change of the text at Dec 6 1994