The Scale Dependence of the Hadron Multiplicity in Quark and Gluon Jets and a Precise Determination of $C_A/C_F$

DELPHI Collaboration, P. Abreu et al

Data collected at the Z resonance using the DELPHI detector at LEP are used to determine the charged hadron multiplicity in gluon and quark jets as a function of a transverse momen…