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RISHadronization properties in annihilation at GeV centre of mass energy
-particle, and particle-flow distributions are presented. Our measurements are compared with QCD + fragmentation models that use either leading-logarithmic parton-shower evolution or QCD matrix elements at the parton level, and either string or cluster fragmentation...
Hadronization and QCD in annihilation at
We investigate hadronization of charged particles in annihilation at Center of mass energies. Our results are consistent with the Webber and the LUND parton shower models but show significant deviations from the LUND ...
Measurement of QCD Parameters by using the Single Dressed Gluon approximation
This article is based on renormalization analysis by using the single dressed gluon (SDG) approximation.This model is used to measure the coupling constant in perturbative as well as in the non- perturbative part of the QCD theory. We employ...
مدل های گوناگون QCD و مقایسه انها با داده های تجربی و داده های مونت کارلو در برهمکنش های الکترون پوزیترون
در این مقاله مدل های گوناگون مبنی بر هادرونی شدن ذرات را مورد مطالعه قرار می دهیم. برای این منظور از داده های تجربی به همراه داده های مونت کارلو استفاده می کنیم. مدل هائی را که مورد مطالعه قرار می دهم عبارتند از مدل وبر، ...
calculation of QCD parameters by using the jet resolution parameter
Me describe the measurement of the coupling constant from both the dispersive and the shape function model. This parameter depends on the scale at which QCD process occurs. we present the distributions of the jet resolution parameter (Y3...
Decoupling the NLO- coupled QED * QCD, 6 DGLAP evolution equations, using Laplace transform method
We analytically solved the QED ⊗ QCD-coupled DGLAP evolution equations at leading
15 order (LO) quantum electrodynamics (QED) and next-to-leading order (NLO) quantum
16 chromodynamics (QCD) approximations, using the Laplace transform...
momentum spectra of identified hadrons at electron - positron annihilations and compared to QCD calculations
Charged particle momentum distributions are studied and the distributions are compared with the QCD models. And finally the coupling constant is calculated....
momentum specra of identified hadrons in
with the corresponding results obtained at both lower and higher center of mass energies are compared to QCD predictions in theoretical approach to study the energy dependence of the strong interaction, and to test QCD as the theory describing it. To achieve this...
بررسی رویداد های چند جتی در نابودی الکترون - پوزیترون
در این مقاله رویداد های چند جتی را از طریق کوانتوم رنگ ( QCD ) مورد مطالعه قرار می دهیم....
QCD test with the momentum spectra and the second binomial moment R2 using e+e- data
are also studied. Our results are compared with both experimental data from high and low energy , and experiments and QCD calculations in various theoretical approaches. In general, a good agreement is found between the measurements...