Monte Carlo program BHLUMI 2.01 for Bhabha scattering at low angles with Yennie-Frautschi-Suura exponentiation

Published: 01-01-1992| Version 1 | DOI: 10.17632/8typpvd7t6.1
S. Jadach,
E. Richter-Wa̧s,
B.F.L. Ward,
Z. Wa̧s


Abstract A Monte Carlo program for small-angle Bhabha scattering with an overall precision of 0.25% is presented. The QED calculation at this precision level is of vital importance for luminosity measurements at LEP/SLC experiments. BHLUMI is a stand-alone Monte Carlo event generator with three sub-generators: BHLUM2, LUMLOG and OLDBIS. The first of them is based on Yennie-Frautschi-Suura @(α) exponentiation and the two other ones serve, essentially, to cross-check results from the first one. LUMLOG r... Title of program: BHLUMI version 2.01 Catalogue Id: ACHI_v1_0 Nature of problem Small-angle Bhabha scattering process is used in all electron-positron colliders to calculate machine luminosity. This process is subject to QED radiative corrections which has to be known for arbitrary cut-offs and/or acceptance with precision at least factor three better than pure experimental precision. It means that the level of 0.2 per cent should be reached. The realistic simulation should include multiple emission of the bremsstrahlung photons. Versions of this program held in the CPC repository in Mendeley Data ACHI_v1_0; BHLUMI version 2.01; 10.1016/0010-4655(92)90196-6 ACHI_v2_0; BHLUMI version 4.04; 10.1016/S0010-4655(96)00156-7 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)