A note on failure of the ladder approximation to QCD

Hong-Shi Zong, Wei-Min Sun
2006 Physics Letters B  
In the paper [Hong-Shi Zong, Wei-Min Sun, Phys. Lett. B 640 (2006) 196], the authors claim that our proof of the inconsistency of the ladder approximation to QCD [Phys. Lett. B 611 (2005) 129] was incorrect. However, their claim is based on a derivation which contains a rough mathematical mistake, namely the unjustified change of variables in the divergent (though regularized) integrals. In this comment I will show this explicitly, so our conclusion that the ladder approximation to QCD is inconsistent remains, of course, correct.
doi:10.1016/j.physletb.2006.07.065 fatcat:jgqf2cvhmbcsnnadt7o7tn45ma