Calculation of QCD parameters by using the jet resolution parameter
R. Saleh-Moghaddam, M. E. Zomorrodian*)
Department of Physics, Faculty of sciences, Ferdowsi University of Mashhad, 91775-1436 Mashhad, Iran
Abstract
We describe the measurement of the coupling constant from both the dispersive
and the shape function models. This parameter depends on the scale at which the
QCD process occurs. We present distributions of the jet resolution parameter
(Y3). This parameter is one observable among the event shape variables.
Both models are divided into the perturbative as well as the non-perturbative
regions. The average value of the strong coupling constant is
being consistent with world average. We will
explain all these features in this paper.