Grassi, Pietro A.Kniehl, Bernd A.Sirlin, Alberto2004-12-102004-12-1020012001http://hdl.handle.net/2003/1811110.17877/DE290R-11995enThe American Physical SocietyPhysical Review Letters530Width and Partial Widths of Unstable Particles10.1103/PhysRevLett.86.389article (journal)