Muon colliders, Monte Carlo and gauge invariance
Institute for Theoretical Physics, University of Nijmegen, Toernooiveld 1, 6525 ED, Nijmegen, The Netherlands
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If calculated in the standard way, the cross section for the collision of two unstable particles turns out to diverge. This is because part of such a cross section is proportional to the size of the colliding beams. This effect is called the “linear beam size effect”. We present a way of including this linear beam size effect in the usual Monte Carlo integration procedure. Furthermore we discuss the gauge breaking that this may cause.
© Springer-Verlag, 2004