Gauge-invariant decomposition of meson energy in two-dimensional QCD

doi:10.1103/PhysRevD.98.074024

	Gauge-invariant decomposition of meson energy in two-dimensional QCD
	Yu R(余睿); Jia, Yu; Yu, Rui; Xiong, Xiaonu; Jia Y(贾宇)
刊名	PHYSICAL REVIEW D
	2018
卷号	98 期号:7 页码:74024
ISSN号	2470-0010
DOI	10.1103/PhysRevD.98.074024
文献子类	Article
英文摘要	This work is driven by our curiosity about some basic questions in QCD: how is the energy of a moving hadron partitioned among different gauge-invariant sectors in the QCD Hamiltonian? How is the energy of a massless pion separated between quark and gluon sectors, particularly in the soft pion limit? Is it possible to decompose the celebrated Gell-Mann-Oakes-Renner (GOR) relation? To what extent can we justify the quark potential model from the field-theoretical mass decomposition for heavy quarkonium? Due to the limitations of contemporary nonperturbative tools, we do not yet know answers to these questions in realistic QCD. In this work, we take the 't Hooft model (two-dimensional QCD in the large-N limit) as a prototype that mimics some essential aspects of the true QCD. We investigate the gauge-invariant energy decomposition of a flavor-neutral meson that can carry an arbitrary momentum (including the stationary case), with the meson species ranging from the massless pion to bottomonium. All the aforementioned questions can be addressed satisfactorily within this model; in particular, some unexpected patterns related to the pion are discovered for the first time in two-dimensional QCD. We hope that our study can offer some useful clues and stimulation for future investigation of hadron energy decomposition in realistic QCD.
电子版国际标准刊号	2470-0029
WOS关键词	CHIRAL-SYMMETRY
WOS研究方向	Astronomy & Astrophysics ; Physics
语种	英语
WOS记录号	WOS:000448283600001
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/286805]
专题	高能物理研究所_理论物理室
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Yu R,Jia, Yu,Yu, Rui,et al. Gauge-invariant decomposition of meson energy in two-dimensional QCD[J]. PHYSICAL REVIEW D,2018,98(7):74024.
APA	余睿,Jia, Yu,Yu, Rui,Xiong, Xiaonu,&贾宇.(2018).Gauge-invariant decomposition of meson energy in two-dimensional QCD.PHYSICAL REVIEW D,98(7),74024.
MLA	余睿,et al."Gauge-invariant decomposition of meson energy in two-dimensional QCD".PHYSICAL REVIEW D 98.7(2018):74024.