Dpes massless QCD have vacuum energy?
arXiv:0708.1057 · doi:10.1088/1367-2630/10/5/053040
Abstract
It is widely thought that this question has a positive answer, but we argue that the support for this belief from both experiment and theory is weak or nonexistent. We then list some of the ramifications of a negative answer.
8 pages, no figures, version to appear in NJP