radiative Bhabha scattering
Dear Whizard authors,
we want to generate events for the process ee-> ee gamma, which is a background to monophoton signatures if both of the electrons are either very soft or stay in the beam pipe. This means ideally no cuts can be placed on the electrons, only on the photon. Requirements on the photon do also bias the electron kinematics a bit, but nevertheless we do not get a convergence with Whizard if no electron cuts are applied. I think this is expected because there are singularities which are only cancelled at higher order.
How can we know in a well-defined way what is the part of the cross section we are missing when we apply cuts on the electrons? Can we generate a sample with a cut on the electron theta and energy that removes the singularity and still be somewhat sure that we are not missing too much of a contribution? Is there a way to get the higher order in Whizard or do you know some other tool that can do it?
An example sindarin can be found here:
https:/
Thanks for any advice!
Ulrike & Philipp & Jean-Jacques
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- Wolfgang Kilian Edit question
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