Language : English
Xiaonu Xiong
  • Personal Information

    Professor


    Supervisor of Doctorate Candidates


    Supervisor of Master's Candidates

    Date of Employment:2019-02-25

    School/Department:School of Physics

    Education Level:PhD Graduate

    Business Address:物理与电子学院525

    Sex:Male

    Contact Information:xnxiong@csu.edu.cn

    Degree:Doctoral degree

    Status:Employed

    Other Post:Referee of Physical Review Letters and Physical Review D

    Alma Mater:Peking University

    Discipline:Physics

  • Profile

    从事高能物理、粒子物理方向研究,主要研究方向: 强子结构、格点量子色动力学、有效场论及低维场论。


                   

                                       T4c_on_LHC.png               TMD_latt.png           tomography.png


    INSPIRE数据库
    https://inspirehep.net/authors/1258723?ui-citation-summary=true


    代表研究(作者按姓名排序):


    [1] Nucleon Transversity Distribution in the Continuum and Physical Mass Limit from Lattice QCD

    Lattice Parton Collaboration

    Phys. Rev. Lett. (2023) 131, 261901, DOI: 10.1103/PhysRevLett.131.261901

    应用大动量有效理论(Large Momentum Effective field Theory, LaMET)通过格点量子色动力学(格点QCD)方法计算了横向极化质子中横向极化夸克的部分子分布函数(δq, transversity)。δq提供了核子横向自旋起源的信息,其物理诠释是横向极化的核子中,夸克自旋平行/反平行于质子自旋的光锥动量分布的不对称性。是首次同时进行了连续时空极限、大动量极限和物理π介子质量极限外推的计算。计算中采用了目前最为合理的重整化方案—混合重整化(Hybrid renormalization) 并应用重整化群重求和方案对LaMET方法失效的区域进行了系统的估计。此计算是目前对于δq最精细的格点QCD计算

    trnsvrsty_calc.png

    [2] Factorization Theorem Connecting the Light-Cone Distribution Amplitudes of Heavy-Flavor Mesons in QCD and Heavy-Quark Effective Theory

    Saadi Ishaq, Yu Jia, Xiaonu Xiong, De-ShanYang

    Phys. Rev. Lett (2020) 125, 132001, DOI: 10.1103/PhysRevLett.125.132001

    QCD中所定义的LCDA(ΦQCD)与重夸克有效场论(Heavy Quark Effective Theory, HQET)中所定义的LCDA(ΦHQET)是描述重味介子非微扰性质的重要物理量。ΦQCD为QCD中所定义的LCDA,参与介子的高能遍举产生过程的因子化,目前知之甚少。而ΦHQET为HQET中定义的LCDA,在重味物理中起着核心作用,被广为研究。近三十年来这两种LCDA被认为是相互独立的。该研究提出了一个新的因子化定理将两种LCDA关联起来,并给出了匹配因子的解析形式。将Β介子硬产生过程中的三个重要能标的效应分离系统地对大对数项(ln(μ/mb))求和,并利用Β介子衰变过程中被广为研究的重夸克有效理论光锥分布振幅作为输入参数,大幅提高理论预言的精度。对精确预言重味介子高能遍举产生过程、检验标准模型CKM机制(夸克混合)以及在B介子相关过程中寻找新物理迹象以及研究CP破坏有重要意义。

          

                                                                                  LCDA_Fact.png-1.png                   CP.png



    [3] Solving the Bars-Green equation for moving mesons in two-dimensional QCD

    Yu Jia, Shuangran Liang, LiuJi Li, Xiaonu Xiong
    JHEP 1711 (2017) 151, 007/JHEP11(2017)151 DOI: 
    10.1007/JHEP11(2017)151



    [4] One-loop matching for parton distributions: Nonsinglet case
    Xiaonu Xiong, Xiangdong Ji, Jian-Hui Zhang, Yong Zhao
    Phys.Rev. D90 (2014) no.1, 014051, DOI:
    10.1103/PhysRevD.90.014051


                                                                                        light_cone1.png       LaMET_matching.png


    [5] Proton Spin Structure from Measurable Parton Distributions
    Xiangdong Ji, Xiaonu Xiong, Feng Yuan
    Phys.Rev.Lett. 109 (2012) 152005, DOI:
    10.1103/PhysRevLett.109.152005


    proton_spin_pic.png-1.png


    [6] The quark orbital angular momentum from Wigner distributions and light-cone wave functions
    Cedric Lorce, Barbara Pasquini, Xiaonu Xiong, Feng Yuan,
    Phys.Rev. D85 (2012) 114006, DOI:
    10.1103/PhysRevD.85.114006


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  • Education Background

    [1]  2005.9- 2009.6
    Central China Normal University | Physics  | University graduated | Bachelor's degree
    [2]  2009.9- 2014.7
    Peking Univeristy | Theoretical physics | PhD Graduate | Doctoral degree | Center for High Energy Physics
    [3]  2010.9- 2011.8
    Lawrence Berkeley National Laboratory | 物理学 | 联合培养
  • Work Experience

    [1]  2018.10- 2019.3
    Helmholtz Institut für Strahlen-und Kernphysik, Universität Bonn; Forschungszentrums Jülich, Helmholtz Association | postdoctoral researcher
    [2]  2016.10- 2018.9
    Forschungszentrums Jülich, Helmholtz Association | 高等模拟计算所 | postdoctoral researcher
    [3]  2014.9- 2016.8
    Istituto Nazionale di Fisica Nucleare (INFN) | postdoctoral researcher
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