Ring-like events: Cherenkov gluons or Mach waves?

Abstract

Similar to electromagnetic forces, strong interactions might induce such collective effects as Cherenkov and Mach waves. Their conical structure would be responsible for specific ring-like events. The theoretical and experimental arguments in favor of these phenomena are discussed and their most important features are described.

Comments: 12 pages, 5 figures, LATEX, misprint corrected