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Analysis of the gluon distribution with next-to-leading order splitting function at small-x^(*)

Chinese Physics C 2024年第6期48卷 38-44页

作者：陈京萱王晓鹏蔡燕兵陈旭荣王倩 Key Laboratory of Atomic and Subatomic Structure and Quantum Control(MOE) Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of MatterInstitute of Quantum MatterSouth China Normal UniversityGuangzhou 510006China Guangdong-Hong Kong Joint Laboratory of Quantum Matter Guangdong Provincial Key Laboratory of Nuclear ScienceSouthern Nuclear Science Computing CenterSouth China Normal UniversityGuangzhou 510006China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China Lanzhou University Lanzhou 730000China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China Guizhou Key Laboratory in Physics and Related Areas Guizhou University of Finance and EconomicsGuiyang 550025China Southern Center for Nuclear-Science Theory(SCNT) Institute of Modern PhysicsChinese Academy of SciencesHuizhou 516000China

An approximated solution for the gluon distribution from DGLAP evolution equations with the NLO splitting function in the small-x limit is *** first obtain simplified forms of the LO and NLO splitting functions in the small-x *** these approximated splitting functions,we obtain the analytical gluon distribution using the Mellin *** free parameters in the boundary conditions are obtained by fitting the CJ15 gluon distribution *** find that the asymptotic behavior of the gluon distribution is consistent with the CJ15 data;however,the NLO results considering the"ladder"structure of gluon emission are slightly better than the LO *** results indicate that the corrections from NLO have a significant influence on the behavior of the gluon distribution in the small-x *** addition,we investigate the DGLAP evolution of the proton structure function using the analytical solution of the gluon *** differential structure function reveals that our results have a similar tendency to the CJ15 data at small-x.

关键词： DGLAP equation gluon distribution small-x structure function

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Drag force on a moving heavy quark with deformed string configuration

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Communications in Theoretical Physics 2022年第4期74卷 61-67页

作者： Sara Tahery xurong chen Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China Guangdong Provincial Key Laboratory of Nuclear Science Institute of Quantum MatterSouth China Normal UniversityGuangzhou 510006China

To study drag force on a moving heavy quark through a plasma,we use a deformed AdS spacetime,in which deformation parameter c describes non-conformality in AdS/*** this case,the quark is mapped to a probe string in the AdS *** the probable contribution of the deformation parameter in the probe string,we apply a general form of c-dependent string ansatz in the drag force ***,we find the acceptable value of this parameter as it satisfies QCD *** this result,we also discuss the diffusion constant which is in agreement with the phenomenological result for the non-relativistic ***,we show that while in absence of a deformation parameter,the probe string is a strictly increasing function of radial coordinate,the c-dependent probe string has a maximum value versus z.

关键词： AdS/QCD drag force deformation parameter

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Study of transversity GPDs from pseudoscalar mesons production at EIC of China

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Communications in Theoretical Physics 2023年第6期75卷 86-95页

作者： S V Goloskokov Ya-Ping Xie xurong chen Bogoliubov Laboratory of Theoretical Physics Joint Institute for Nuclear ResearchDubna 141980Moscow regionRussia Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China Institute of Quantum Matter South China Normal UniversityGuangzhou 510006China

The exclusive η and π^(0)electroproduction is studied in the handbag approach based on the generalized parton distributions(GPDs)*** of π^(0)and η mesons are calculated for future electron-ion collider in China(EicC)energy ranges,using obtained cross sections we extract information on the transversity GPDs contributions to these processes.

关键词： meson production general parton distributions handbag method

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Tackling the kaon structure function at EicC

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Chinese Physics C 2022年第6期46卷 192-202页

作者：谢港韩成栋王荣陈旭荣 Guangdong Provincial Key Laboratory of Nuclear Science Institute of Quantum MatterSouth China Normal UniversityGuangzhou 510006China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China

Measuring the kaon structure beyond proton and pion structures is a prominent topic in hadron physics,as it is one way to understand the nature of the Nambu-Goldstone boson of QCD and observe the interplay between the EHM and HB mechanisms for hadron mass *** this study,we present a simulation of the leading A baryon tagged deep inelastic scattering experiment at EicC(Electron-ion collider in China),which is engaged to unveil the internal structure of kaon via the Sullivan *** to our simulation results,the suggested experiment will cover the kinematical domain of 0.05≤xK≤0.85 and Q^(2)up to 50 GeV^(2),with the acceptable statistical *** the relatively low-Q^(2) region(<10 GeV^(2)),the Monte-Carlo simulation shows a good statistical precision(<5%)for the measurement of the kaon structure function *** the high-Q^(2) region(up to 50 GeV^(2)),the statistical uncertainty of F_(2)^(K) is also acceptable(<10%)for the data at xK<*** perform such an experiment at an electron-ion collider,a high-performance zero-degree calorimeter is *** magnitude of the background process and the assumed detector capabilities are also discussed and illustrated in the paper.

关键词： kaon structure function electron-ion collider parton distribution function tagged deep inelastic scattering

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Exclusive π^(0) production at EIC of China within handbag approach

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Chinese Physics C 2022年第12期46卷 50-57页

作者： S.V.Goloskokov 谢亚平陈旭荣 Laboratory of Theoretical Physics Joint Institute for Nuclear ResearchDubna 141980MoscowRussia Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China Institute of Quantum Matter South China Normal UniversityGuangzhou 510006China

Exclusive π^(0) electroproduction is analyzed within the handbag approach based on Generalized Parton Distribution(GPDs)*** consider the leading-twist contribution together with the transversity *** is shown that the transversity GPDs H_(T) and E_(T) are essential in the description of the π^(0) cross *** for the future Electron-Ion Collider of China(EicC)energy range are *** is found that transversity dominanceσ_(T)>>σ_(L),observed at low energies,is valid up to the EicC energy range.

关键词： general parton distributions nucleon structure deep virtual meson production

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Gottfried sum rule from maximum entropy method quark distributions with DGLAP evolution and with DGLAP evolution with GLR-MQ-ZRS corrections

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Chinese Physics C 2018年第10期42卷 25-30页

作者：韩成栋付强陈旭荣 Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China Lanzhou University Lanzhou 730000China

A new method to test the valence quark distribution of nucleons obtained from the maximum entropy method using the Gottfried sum rule by performing the DGLAP equations with GLR-MQ-ZRS corrections and the original leading-order/next-to-leading-order （LO/NLO） DGLAP equations is outlined. The test relies on knowledge of the unpolarized electron proton structure function F2^ep and the electron neutron structure function F2^en and the assumption that Bjorken scaling is satisfied. In this work, the original Gottfried summation value obtained by the integrals of the structure function at different Q2 is in accordance with the theoretical value of 1/3 under the premise of light-quark flavor symmetry of the nucleon sea, whether it results from dynamical evolution equations or from global quantum chromodynamics fits of PDFs. Finally, we present the summation value of the LO/NLO DGLAP global fits of PDFs under the premise of light-quark flavor asymmetry of the nucleon sea. According to analysis of the original Gottfried summation value with two evolution equations at different Q2 we find that the valence quark distributions of nucleons obtained by using the maximum entropy method are effective and reliable.

关键词： Gottfired sum rule DGLAP-GLR-MQ-ZRS equations DGLAP equations deviation

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A comparison of condensate mass of QCD vacuum between Wilson line approach and Schwinger effect

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Chinese Physics C 2021年第4期45卷 123-129页

作者： Sara Tahery 陈旭荣邹丽平 Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China University of Chinese Academy of Sciences Beiing 100049China Guangdong Provincial Key Laboratory of Nuclear Science Institute of Quantum MatterSouth China Normal UniversityGuangzhou 510006China

We studied the condensate mass of QCD vacuum through the duality approach via dilaton wall back-ground in the presence of the parameter c,which represents the condensation in a holographic set ***,fromWilson line calculation,we found m_(0)^(2)(i.e.,the condensate parameter in mixed non-local condensation),whose beha-vior mimics that of *** value of m_(0)^(2)that we found by this approach is in agreement with QCD *** we considered the produced mass m via the Schwinger effect mechanism in the presence of the parameter *** show that vacuum condensation generally contributes the mass dominantly and that the produced mass via *** effect is suppressed by m_(0).

关键词： AdS/QCD holographic Schwinger effect gluon condensation of vacuum

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Deep inelastic scattering with proton target in the presence of gluon condensation using holography

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Chinese Physics C 2023年第1期47卷 28-37页

作者： Sara Tahery 王晓鹏陈旭荣 Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China Lanzhou University Lanzhou 730000China University of Chinese Academy of Sciences Bejing 100049China Guangdong Provincial Key Laboratory of Nuclear Science Institute of Quantum MatterSouth China Normal UniversityGuangzhou 510006China

We study the deep inelastic scattering(DIS)of a proton-targeted lepton in the presence of gluon condensation using gauge/gravity *** use a modified AdS5background where the modification parameter c corresponds to the gluon condensation in the boundary ***,by examining the electromagnetic field,we establish that a non-zero c can increase field *** aim is to obtain the acceptable value of c for this *** method is based on setting the mass of the proton as an eigenvalue of the baryonic state equations of the DIS to find the acceptable value of the parameter c on the other side of the ***,in the second step,we calculate wave function equations for the baryonic states where the mass of the proton target requires a value contribution of c as c=0.0120 *** with the electromagnetic field and baryonic states,we derive the holographic interaction action related to the amplitude of the ***,we compute the corresponding structure functions numerically as functions of x and q,which are Bj?rken variables and the lepton momentum transfers,*** the Jlab Hall C data with our theoretical calculations,our results are acceptable.

关键词： DIS AdS/QCD Gluon condensation Proton

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刘应袭刻《西厢记》:陈眉公本的翻刻重评本

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图书馆杂志 2024年第7期43卷 110-118页

作者：杨绪容上海大学文学院上海200444

万历间刘应袭(太华)梓《李卓吾批评合像北西厢记》,是一个孤本,现藏于美国伯克莱加州大学东亚图书馆。郭立暄率先撰文研究其书,并提出陈眉公本据刘太华本刊刻的意见。陈旭耀表示此说“或可商榷”。本文认为,刘太华本乃是陈眉公本的翻刻... 详细信息

万历间刘应袭(太华)梓《李卓吾批评合像北西厢记》,是一个孤本,现藏于美国伯克莱加州大学东亚图书馆。郭立暄率先撰文研究其书,并提出陈眉公本据刘太华本刊刻的意见。陈旭耀表示此说“或可商榷”。本文认为,刘太华本乃是陈眉公本的翻刻重评本,其正文和批语都是在陈眉公本的基础上,再参校容与堂本而成。故此认定刘本的出版时间晚于陈眉公本,即在万历四十六年(1618)之后。孙月峰本的渊源关系与刘太华本相同,属于兄弟关系,相互之间并无直接影响。

关键词：《西厢记》刘应袭本陈眉公本翻刻重评本孙月峰本

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含风电的交直流互联电网自适应SPMC调频策略

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现代电力 2022年第4期39卷 414-421页

作者：赵熙临陈绪荣张乘承武鹏麒湖北工业大学电气与电子工程学院湖北省武汉市430068

大规模风电接入交直流互联电网,对自动发电控制(automatic generation control,AGC)的控制性能及调频能力提出了更高的要求。在风电参与电力系统调频的基础上,提出基于功率调制控制器(supplementary power modulation controller,SPMC)... 详细信息

大规模风电接入交直流互联电网,对自动发电控制(automatic generation control,AGC)的控制性能及调频能力提出了更高的要求。在风电参与电力系统调频的基础上,提出基于功率调制控制器(supplementary power modulation controller,SPMC)的区域间功率补偿策略。首先,考虑到高压直流输电(high voltage direct current,HVDC)环节过载率变化的弹性特征,提出一种同时考虑功率与频率变化的自适应动态SPMC策略,使其在参与系统调频时,能有效提升HVDC中功率调整的快速性;其次,在HVDC链路主动参与系统调频的基础上,考虑风电的不确定性,利用综合惯性控制改变风电输出功率,以进一步提升系统调频性能指标。仿真结果表明,所提策略的动态功率调制特性可以有效提升区域间功率传输的针对性,并提高电网调频效果。

关键词：交直流互联电网功率调制控制器高压直流输电风电

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