Abstract
Three-dimensional cutoff regulators are frequently employed in multinucleon calculations, but they violate chiral symmetry and Lorentz invariance. A cutoff regularization scheme is proposed to compensate systematically at subleading orders for these symmetry violations caused by regulator artifacts. This is especially helpful when a soft momentum cutoff has to be used for technical reasons. It is also shown that dimensional regularization can still be used for some Feynman (sub)diagrams while cutoff regulators are used for the rest.
- Received 29 December 2015
- Revised 22 February 2016
DOI:https://doi.org/10.1103/PhysRevC.93.044003
©2016 American Physical Society
Physics Subject Headings (PhySH)
Nuclear Physics