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Nonlinear corrections for the nuclear gluon distribution in eA processes

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Chinese Physics C 2024年第3期48卷 52-64页

作者： g.r.boroun B.rezaei F.Abdi Department of Physics Razi UniversityKermanshah 67149Iran.

An analytical study with respect to the nonlinear corrections for the nuclear gluon distribution function in the next-to-leading order approximation at small x is *** consider the nonlinear corrections to the nuclear gluon distribution functions at low values of x and Q^(2) using the parametrization F_(2)(x,Q^(2))and the nuclear modification factors obtained from the Khanpour-Soleymaninia-Atashbar-Spiesberger-guzey *** CT18 gluon distribution is used for the baseline proton gluon density at Q^(2)_(0)=*** discuss the behavior of the gluon densities in the next-to-leading order and the next-to-next-to-leading order approximations at the initial scale Q^(2)_(0),as well as the modifications due to the nonlinear *** find that the QCD nonlinear corrections are more significant for the next-to-leading order accuracy than the next-to-next-to-leading order for light and heavy *** results of the nonlinear gLr-MQ evolution equation are similar to those obtained with the rausch-guzey-Klasen gluon upward and downward evolutions within the *** magnitude of the gluon distribution with the nonlinear corrections increases with a decrease in x and an increase in atomic number A.

关键词： gluon distribution nonlinear corrections light and heavy nuclei low x physics

Charge Dependency of Strong Nuclear Force via Phase Shift Analysis of Nucleon-Nucleon Potential

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Communications in Theoretical Physics 2004年第2期41卷 279-282页

作者： N.ghahramany g.r.boroun M.Hashemi Physics Department Shiraz UniversityShiraz 71454Iran

Using the most recent phase shift data for pp,nn,and np elastic scattering for different states (l=0,1,...) in the energy range of i MeV to 350 MeV,the charge dependency of the strong nuclear force is *** results indicate that although the charge independency holds in most of the energy range,such charge independency is broken in the particular energy range of 120 MeV to 200 MeV for all partial wave states considered here.

关键词： elastic scattering nuclear force phase shift nucleon-nucleon potential

Azimuthal Dependence of Intrinsic Top in Photon-Quark Scattering and Higgs Production in Boson-gluon Fusion DIS

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Communications in Theoretical Physics 2017年第11期67卷 654-660页

作者： g.r.boroun A.Khanehzar M.Boustanchi Kashan Physics Department Razi University

In this paper, we study the top content of nucleon by analyzing azimuthal asymmetries in lepton-nucleon deep inelastic scattering(DIS), also we search for the Higgs boson associated production channel, tˉt H, at the large hadron-electron collider(LHe C) caused by boson-gluon fusion(BgF) contribution. We use azimuthal asymmetries inγ*Q cross sections in terms of helicity contributions to semi-inclusive deep inelastic scattering to investigate numerical properties of the cos 2? distribution. We conclude that measuring azimuthal distributions caused by intrinsic heavy quark production can directly probe heavy quarks inside nucleon. Moreover, in order to estimate the probability of producing the Higgs boson, we suggest another approach in the framework of calculating tˉt cross section in boson-gluon fusion mechanism. Finally, we can confirm that this observed massive particle is referred to Higgs boson produced by fermion loop.

关键词： deep inelastic scattering azimuthal asymmetries intrinsic top boson-gluon fusion Higgs coupling

Quasi—Elastic Electron—Deuteron Scattering and Calculation of Neutron Electromagnetic Form Factors at Q2=1.75 to 4.00（geV／c）^2

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Communications in Theoretical Physics 2003年第6期39卷 685-688页

作者： N.ghahramany M.VaezzadehAsadi g.r.boroun PhysicsDepartment UniversityofShirazShiraz71454IslamicRepublicofIran

Electric and Magnetic form factors of neutron are calculated via electron-deuteron scattering at 1.511 ～5.507 geV energy using SLAC group data. Our results show that the neutron electric form factor is not equal to zero;rather it has a small value, indicating that in spite of the fact that total charge is almost neutral, there is a nonuniformcharge distribution within the neutron, and that magnetic form factor follows the dipole fit.

关键词：拟弹性电子-中子散射电磁性偶极配合结构分析原子核电荷分布

Exotic states with QQ■ configuration

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Communications in Theoretical Physics 2023年第3期 60-65页

作者： Z Asadi g r boroun Department of Physics Razi University

In the framework of a non-relativistic quark model, we have calculated the masses of the QQ■(Q = c, b, s and ■=■,■,■) tetraquark states. Using the linear and quadratic confinement potentials inside a Cornell-type potential along with all possible spin and color configurations, the Schr?dinger equation masses of these tetraquark states have been *** on our numerical analysis, linear confinement and quadratic confinement produce acceptable results. Models that use linear confinement estimate charmonium-like tetraquark mass close to experimental data, as well as bottomonium-like tetraquark mass below the threshold of their meson–meson channels.

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Analysis of the Longitudinal Structure Function F_L from the Non-linear regge gluon Density Behavior at Low-x

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Chinese Physics Letters 2015年第11期32卷 18-21页

作者： boroun g.r. rEZAEI B. Physics Department Razi University

The longitudinal structure function with shadowing correction according to the nonlinear effects of the gluon density behavior at low x is considered. The solution of the gLr-MQ evolution equation for the gluon density shows that the FL^g（x, Q2） behavior can be tamed by the singularity at low x values. Comparing our results with H1 data at r=4 geV-1 shows that at very low x this behavior is completely tamed by taking shadowing correction into account.

关键词： Analysis of the Longitudinal Structure Function F_L from the Non-linear regge gluon Density Behavior at Low-x