Investigation of proton structure function F_(2)^(p)at HERA in light of an analytical solution to the Balitsky–Kovchegov equation  

作　　者：Ranjan Saikia Pragyan Phukan Jayanta Kumar Sarma 

机构地区：[1]HEP laboratory,Department of Physics,Tezpur University,Tezpur,Assam-784028,India [2]Department of Physics,Moran College,Moranhat,Assam-785670,India

出　　处：《Communications in Theoretical Physics》2024年第3期120-126,共7页理论物理通讯（英文版）

摘　　要：In this paper,the proton structure function F_(2)^(p)(x,Q^(2))at small-x is investigated using an analytical solution to the Balitsky–Kovchegov(BK)equation.In the context of the color dipole description of deep inelastic scattering(DIS),the structure function F_(2)^(p)(x,Q^(2))is computed by applying the analytical expression for the scattering amplitude N(k,Y)derived from the BK solution.At transverse momentum k and total rapidity Y,the scattering amplitude N(k,Y)represents the propagation of the quark-antiquark dipole in the color dipole description of DIS.Using the BK solution we extracted the integrated gluon density xg(x,Q^(2))and then compared our theoretical estimation with the LHAPDF global data fits,NNPDF3.1sx and CT18.Finally,we have investigated the behavior of F_(2)^(p)(x,Q^(2))in the kinematic region of 10^(-5)≤x≤10^(-2)and 2.5 GeV^(2)≤Q^(2)≤60 GeV^(2).Our predicted results for F_(2)^(p)(x,Q^(2))within the specified kinematic region are in good agreement with the recent high-precision data for F_(2)^(p)(x,Q^(2))from HERA(H1 Collaboration)and the LHAPDF global parametrization group NNPDF3.1sx.

关 键 词：quantum chromodynamics(QCD) perturbative QCD(pQCD) proton structure function SMALL-X Balitsky-Kovchegov equation 

分 类 号：O572.2[理学—粒子物理与原子核物理]