Infrared modified QCD couplings and Bjorken sum rule

16th Workshop on High Energy Spin Physics

Khandramai, V.L.^1 ; Teryaev, O.V.^2 ; Gabdrakhmanov, I.R.^2

International Center for Advanced Studies, Technical University, Gomel

246746, Belarus^1

Bogoliubov Laboratory of Theoretical Physics, JINR, Dubna

141980, Russia^2

关键词: Analysis of data;    Gerasimov-Drell-Hearn sum rules;    Integral representation;    Integral transformations;    Low energy regions;    Low momentum transfers;    Perturbation theory;    Perturbative expansion;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/678/1/012018/pdf
DOI  :  10.1088/1742-6596/678/1/012018

来源: IOP

【 摘 要 】

We test the recently proposed "Massive" Perturbation Theory (MPT) for the description of the Γ1p-ndata at low momentum transfers. The MPT constructed on the two grounds: the first is pQCD with only one parameter added, an effective "glueball mass" mp Mgl 1 GeV; serving as an infrared "regulator"; the second stems out of the ghost- free Analytic Perturbation Theory comprising non-power perturbative expansion that makes it compatible with linear integral transformations. It is regular in the low-energy region and could serve as a practical means for the analysis of data below 1 GeV up to the IR-limit. We study the non-perturbative Bjorken sum rule higher twists correction by using the MPT, the integral representation for infinite sum of higher twists coefficients and the QCD-inspired model for the Q2-dependence of the generalized Gerasimov-Drell-Hearn sum rule.