Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-11-27
Eur.Phys.J. C40 (2005) 199-203
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages Latex
Scientific paper
10.1140/epjc/s2005-02144-x
We discuss the difference between n-dimensional regularization and n-dimensional reduction for processes in QCD which have an additional mass scale. Examples are heavy flavour production in hadron-hadron collisions or on-shell photon-hadron collisions where the scale is represented by the mass $m$. Another example is electroproduction of heavy flavours where we have two mass scales given by $m$ and the virtuality of the photon $Q=\sqrt{-q^2}$. Finally we study the Drell-Yan process where the additional scale is represented by the virtuality $Q=\sqrt{q^2}$ of the vector boson ($\gamma^*, W, Z$). The difference between the two schemes is not accounted for by the usual oversubtractions. There are extra counter terms which multiply the mass scale dependent parts of the Born cross sections. In the case of the Drell-Yan process it turns out that the off-shell mass regularization agrees with n-dimensional regularization.
Smith Jeffrey J.
van Neerven W. L.
No associations
LandOfFree
The difference between n-dimensional regularization and n-dimensional reduction in QCD does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The difference between n-dimensional regularization and n-dimensional reduction in QCD, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The difference between n-dimensional regularization and n-dimensional reduction in QCD will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-691839