Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-11-10
Physics
High Energy Physics
High Energy Physics - Phenomenology
7 pages (Latex), 6 figures (Postscript), 2 tables, uses sprocl_mod.sty
Scientific paper
After 10 years of steadily increasing the experimental precision at LEP/SLC, there is a strong demand on an update of existing programs for fermion pair production. We present a rederivation of the O(alpha) Bremsstrahlung corrections to e+e- --> f+f- for the semi-analytic program ZFITTER. We focus on observables like total cross section and forward-backward asymmetry in the leptonic case with combined cuts on acollinearity angle, acceptance angle, and minimal energy of the fermions. The outcome of our analysis is a shift of the predictions by ZFITTER at LEP 1 energies off-resonance of a few per mil while at the Z resonance numerical changes can be neglected. Thus we obtain for cross sections and asymmetries at LEP 1 a level of agreement with other programs of better than per mil, like for the kinematically simpler s' cut option. A preliminary analysis of ZFITTER, TOPAZ0, and other codes at LEP 2 energies showing deviations of several per cent with acollinearity cuts enforce a future examination of higher order effects with different cuts. The predictions by LEP/SLC data, however, are not affected within the experimental errors.
No associations
LandOfFree
QED radiative corrections to e+e- --> f+f- with realistic cuts at LEP energies and beyond does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with QED radiative corrections to e+e- --> f+f- with realistic cuts at LEP energies and beyond, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and QED radiative corrections to e+e- --> f+f- with realistic cuts at LEP energies and beyond will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-495965