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题名: Leading-twist distribution amplitudes of scalar and vector mesons
作者: Li, BL ;  Chang, L ;  Ding, M ;  Roberts, CD ;  Zong, HS
刊名: PHYSICAL REVIEW D
出版日期: 2016
卷号: 94, 期号:9, 页码:94014
学科分类: Astronomy & Astrophysics; Physics
DOI: http://dx.doi.org/10.1103/PhysRevD.94.094014
通讯作者: Li, BL (reprint author), Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China.
文章类型: Article
英文摘要: A symmetry-preserving truncation of the two-body light-quark bound-state problem in relativistic quantum field theory is used to calculate the leading-twist parton distribution amplitudes (PDAs) of scalar systems, both ground-state and radial excitations, and the radial excitations of vector mesons. Owing to the fact that the scale-independent leptonic decay constant of a scalar meson constituted from equal-mass valence constituents vanishes, it is found that the PDA of a given scalar system possesses one more zero than that of an analogous vector meson. Consequently, whereas the mean light-front relative momentum of the valence constituents within a vector meson is zero, that within a scalar meson is large, an outcome which hints at a greater role for light-front angular momentum in systems classified as P-wave in quantum mechanical models. Values for the scale-dependent decay constants of ground-state scalar and vector systems are a by-product of this analysis, and they turn out to be roughly equal, viz. similar or equal to 0.2 GeV at an hadronic scale. In addition, it is confirmed that the dilation characterizing ground-state PDAs is manifest in the PDAs of radial excitations too. The impact of SU(3)-flavor symmetry breaking is also considered. When compared with pseudoscalar states, it is a little stronger in scalar systems, but the size is nevertheless determined by the flavor dependence of dynamical chiral symmetry breaking and the PDAs are still skewed toward the heavier valence quark in asymmetric systems.
类目[WOS]: Astronomy & Astrophysics ;  Physics, Particles & Fields
关键词[WOS]: QUANTUM CHROMODYNAMICS ;  EXCLUSIVE PROCESSES ;  BOUND-STATES ;  FORM-FACTORS ;  QCD ;  CONFINEMENT ;  DECAYS ;  FACTORIZATION ;  F(0)(980) ;  EQUATIONS
收录类别: SCI
项目资助者: National Natural Science Foundation of China [11275097, 11475085, 11535005] ;  U.S. Department of Energy, Office of Science, Office of Nuclear Physics [DE-AC02-06CH11357] ;  Chinese Ministry of Education, under the International Distinguished Professor program
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/21482
Appears in Collections:理论物理所2016年知识产出_期刊论文

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Recommended Citation:
Li, BL,Chang, L,Ding, M,et al. Leading-twist distribution amplitudes of scalar and vector mesons[J]. PHYSICAL REVIEW D,2016,94(9):94014.
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