Test of the flavour independence of using next-to-leading order calculations for heavy quarks
The OPAL Collaboration
G.Abbiendi - et al.
2 Dipartimento di Fisica dell' Università di Bologna and INFN,
40126 Bologna, Italy
Received: 18 March 1999 / Published online: 14 October 1999
We present a test of the flavour independence of the strong coupling constant for charm and bottom quarks with respect to light (uds) quarks, based on a hadronic event sample obtained with the OPAL detector at LEP. Five observables related to global event shapes were used to measure in three flavour tagged samples (uds, c and b). The event shape distributions were fitted by calculations of jet production taking into account mass effects for the c and b quarks. We find: