Pramana - Journal of Physics, ( ISI ), Volume (81), No (5), Year (2013-10) , Pages (775-790)

Title : ( Coupling constant in dispersive model )

Authors: reihaneh saleh moghaddam , Mohammad Ebrahim Zomorrodian ,

Citation: BibTeX | EndNote


Abstract: we study average of moments for event shapes in e^+ e^-→hadrons within the context of next to leading order (NLO) perturbative QCD prediction in dispersive model. Moments used in this article are <1-T>,〈ρ〉,〈B_T 〉 ,〈B_W 〉. We extract the coupling constant (α_s) in perturbative theory and α_0 in the non- perturbative theory using the dispersive model. By fitting the experimental data, we find the values of 〖 α〗_s (M_(Z^0 ))= 0.1171±0.00229 and α_0 (μ_I=2GeV)=0.5068±0.0440. Our results are consistent with the above model. Our results are also consistent with those obtained from other experiments at different energies. We explain all these features in this paper.


, Electron and positron scattering, Perturbative calculations, quantum Monte Carlo
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author = {Saleh Moghaddam, Reihaneh and Zomorrodian, Mohammad Ebrahim},
title = {Coupling constant in dispersive model},
journal = {Pramana - Journal of Physics},
year = {2013},
volume = {81},
number = {5},
month = {October},
issn = {0304-4289},
pages = {775--790},
numpages = {15},
keywords = {Electron and positron scattering; Perturbative calculations; quantum Monte Carlo},


%0 Journal Article
%T Coupling constant in dispersive model
%A Saleh Moghaddam, Reihaneh
%A Zomorrodian, Mohammad Ebrahim
%J Pramana - Journal of Physics
%@ 0304-4289
%D 2013