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Extraction of Structure Function and gluon Distribution Function at Low-x from Cross Section Derivative by regge Behavior

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Communications in Theoretical Physics 2005年第2期43卷 283-286页

作者： g.r.boroun PhysicsDepartment RaziUniversityKermanshah67149Iran

An approximation method based on regge behavior is presented. This new methodrelates the reduced cross section derivative and the structure function regge behavior at low *** the use of this approximation method, the C and λ parameters are calcuiated from the HErAreduced cross section data taken at low-x. Also, we calculate the structure functions F_2(x, Q~2)even for low-x values, which have not been investigated. To test the validity of calculatedstructure functions, we find the gluon distribution function in the Leading order approximationbased on regge behaviour of structure function and compare to the NLO QCD fit to H1 data and NLOparton distribution function.

关键词： regge behavior cross section gluon distribution structure function

Top reduced cross section behavior at the LHeC kinematic range

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Chinese Physics C 2017年第1期41卷 72-76页

作者： g.r.boroun Physics Department Razi University Kermanshah 67149 Iran

The linear and non-linear behavior of the top reduced cross section in the LHe C region is considered concerning the boson-gluon fusion（BgF） model for deep inelastic scattering leptoproduction. We show that the non-linear behavior in this region for the tt production is very small. The behavior of the top reduced cross section and the ratio r^t in these processes are also considered.

关键词： Top reduced cross section nonlinearity low x behavior

Calculation of the gluon Distribution Function Using Alternative Method for the Proton Structure Function

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Communications in Theoretical Physics 2003年第5X期40卷 551-557页

作者： N.ghahramany g.r.boroun PhysicsDepartment ShirazUniversityShiraz71454Iran

A calculation of the proton structure function F2(x,Q^2) is reported with an approximation method that relates the reduced cross section derivative and the F2(x, Q^2) scaling violation at low x by using quadratic form for the structure function. This quadratic form approximation method can be used to determine the structure function F2 (x, Q^2) from the HErA reduced cross section data taken at low x. This new approach can determine the structure functions F2(x,Q^2) with reasonable precision even for low x values which have not been investigated. We observe that the Q^2 dependence is quadratic over the full kinematic covered range. To test the validity of our new determined structure functions, we find the gluon distribution function in the leading order approximation with our new calculation for the structure functions and compare them with the QCD parton distribution functions.

关键词：质子结构函数胶子量子色动力学无弹性散射 QCD 强相互作用

Universal function of the diffractive process in color dipole picture

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Chinese Physics C 2021年第2期45卷 111-118页

作者： Z.Jalilian g.r.boroun Department of Physics Razi UniversityKermanshah67149Iran

In this study,we obtain the universal function corresponding to the diffractive process and show that the cross section exhibits geometrical *** is observed that diffractive theory according to the color dipole approach at small-x is a convenient framework that reveals the color transparency and saturation *** also calculate the contribution of heavy quark production in the diffractive cross section at high energy that is determined by the small size dipole *** ratio of the diffractive cross section to the total cross section in electron-proton collision is the other important quantity that is computed in this work.

关键词： universal function structure function cross section color dipole model diffractive process

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

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

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

Calculation of gluon Distribution Functions in Leading Order by regge-like Behavior at Low-x

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Communications in Theoretical Physics 2005年第5X期44卷 891-896页

作者： g.r. boroun Physics Department Razi University Kermanshah 67149 Iran

An approximate analytical form of the gluon distribution function from the derivative F2 proton structure function data at low-x assuming the regge-like behavior of the gluon distribution function at this limit is presented. In this method, we calculate λ and C parameters for each low-x value at several Q^2 values using the scaling violation of the F2 proton structure function. For low-x, A is found to be independent of x within the experimental accuracy. We make use of the leading order Altarelli-Parisi （A-P） evolution equations in our analysis. To test the validity of our new determined gluon distribution functions, we compare them with the QCD parton distribution functions at low-x region.

关键词： regge-like behavior DgLAP equation for gluon low x