arXiv:hep-ph/0009352·v1·High Energy Physics — Phenomenology
Coherent Exclusive Exponentiation for Precision Monte Carlo Calculations of Fermion Pair Production / Precision Predictions for (Un)stable W+W- Pairs
B.F.L. Ward (1,2,3)🇺🇸 · S. Jadach (1,2,4,5)🇺🇸 · W. Płaczek (2,6)🇨🇭 · M. Skrzypek (2,5)🇨🇭 · Z. Was (2,5) ((1) Department of Physics and Astronomy, University of Tennessee, Knoxville, TN, USA, (2) TH Div., CERN, Geneva, Switzerland, (3) SLAC, Stanford UNiversity, Stanford, CA, USA, (4) Theory Div., DESY, Hamburg, Germany, (5) Institute of Nuclear Physics, Krakow, Poland, (6) Institute of Computer Science, Jagellonian University, Krakow, Poland)🇨🇭
Abstract
We present the new Coherent Exclusive Exponentiation (CEEX), in comparison to the older Exclusive Exponentiation (EEX) and the semi-analytical Inclusive Exponentiation (IEX), for the process e+e- -> f-bar f + n(gamma), f=mu,tau,d,u,s,c,b, with validity for centre of mass energies from tau lepton threshold to 1 TeV. We analyse 2f numerical results at the Z-peak, 189 GeV and 500 GeV. We also present precision calculations of the signal processes e+e- -> 4f in which the double resonant W+W- intermediate state occurs using our YFSWW3-1.14 MC. Sample 4f Monte Carlo data are explicitly illustrated in comparison to the literature at LEP2 energies. These comparisons show that a TU for the signal process cross section of 0.4 percent is valid for the LEP2 200 GeV energy. LC energy results are also shown.
Comments: 5 pages, 4 figures, Presented at ICHEP2000