https://doi.org/10.1140/epjc/s10052-012-2254-0
Letter
Collinearity approximations and kinematic shifts in partonic shower algorithms
1
University of Oxford, Physics Department, Oxford, OX1 3NP, UK
2
Deutsches Elektronen Synchrotron, 22603, Hamburg, Germany
* e-mail: hautmann@mail.cern.ch
Received:
28
September
2012
Revised:
5
November
2012
Published online:
11
December
2012
We study kinematic effects due to the approximation of on-shell, collinear partons in shower Monte Carlo event generators. We observe that the collinearity approximation, combined with the requirements of energy-momentum conservation, gives rise to a kinematic shift, event by event, in longitudinal momentum distributions. We present numerical results in the case of jet and heavy-flavor production processes measured at the LHC.
© Springer-Verlag Berlin Heidelberg and Società Italiana di Fisica, 2012
