YFS2— The second-order Monte Carlo program for fermion pair production at LEP/SLC, with the initial state radiation of two hard and multiple soft photons

Published: 01-01-1990| Version 1 | DOI: 10.17632/zm44pcxcwk.1
Stanislaw Jadach,
B.F.L. Ward


Abstract A Monte Carlo program simulating fermion pair production is presented. It features multiphoton bremsstrahlung out of the initial state beams. The contributions from soft photons are summed rigorously up to an infinite order using the Yennie-Frautschi-Suura method while the contributions from up to two hard photons are also properly treated. Four momenta of all soft and hard photons are explicitly generated and the total energy momentum conservation is exactly obeyed. The program is primarily ... Title of program: YFS2.02 Catalogue Id: ABLO_v1_0 Nature of problem High statistics data samples will be available soon in LEP and SLC experiments allowing for a precise measurements of the Z0 mass, width and various asymmetrics. Since initial state QED bremsstrahlung distorts the shape of the Z0 resonance very strongly it will not be possible to make any statement about the agreement of these data with the standard electroweak model before one is able to calculate all these effects very precisely. The above QED effects depend usually on the experimental accepta ... Versions of this program held in the CPC repository in Mendeley Data ABLO_v1_0; YFS2.02; 10.1016/0010-4655(90)90020-2 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)