Modelling Bose-Einstein correlations at LEP 2
Leif Lönnblad1 - Torbjörn Sjöstrand2
DK-2100 København Ø, Denmark
2 Department of Theoretical Physics, Sölvegatan 14A, S-223 62 Lund, Sweden (e-mail: email@example.com)
Received: 25 November 1997
We present new algorithms for simulating Bose-Einstein correlations among final-state bosons in an event generator. The algorithms are all based on introducing Bose-Einstein correlations as a shift of final-state momenta among identical bosons, and differ only in the way energy and momentum conservation is ensured. The benefits and shortcomings of this approach, that may be viewed as a local reweighting strategy, is compared to the ones of recently proposed algorithms involving global event reweighting. We use the new algorithms to improve on our previous study of the effects of Bose-Einstein correlations on the W mass measurement at 2. The intrinsic uncertainty could be as high as 100 MeV but is probably reduced to the order of 30 MeV with realistic experimental reconstruction procedures.