BBBREM - Monte Carlo simulation of radiative Bhabha scattering in the very forward direction

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Abstract
A fast and simple Monte Carlo program is presented that simulates single Bremsstrahlung in Bhabha scattering, e+e- --> e+e-gamma, without constraints on scattering angles. This allows the study of this process at arbitrarily small, or even vanishing, scattering angles. Experimental cuts can be imposed on an event-by-event basis, allowing for detailed studies of the process as a limitation to beam lifetimes, or a luminosity-measuring device, in e+e- storage rings. As an application, we show that the easy introduction of a cutoff parameter, corresponding to the characteristic distance between particles in the bunches, gives a reduced cross section that is in good agreement with observation.

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