SU(3)-symmetry breaking effects and mass splitting in scalar and pseudoscalar D mesons from QCD sum rules

doi:10.1103/PhysRevD.81.054021

	SU(3)-symmetry breaking effects and mass splitting in scalar and pseudoscalar D mesons from QCD sum rules
	Jin, Hong-Ying 1; Zhang, Jin 1; Zhang, Zhu-Feng 2; Steele, T. G.3
刊名	PHYSICAL REVIEW D
	2010-03-01
卷号	81 页码:12
ISSN号	1550-7998
DOI	10.1103/PhysRevD.81.054021
英文摘要	Motivated by the similar mass splitting in light-light and heavy-light J(P) = 0(-) and J(P) = 0(+) mesons, the SU(3)-symmetry breaking effects splitting the masses in the 0(-) and 0(+) channels of the D meson are analyzed in the framework of QCD sum rules with an underlying c (q) over bar structure. We take into account operator mixing to obtain an infrared stable operator-product expansion method including complete nonperturbative and perturbative O(m(q)) corrections to the correlation function. With the same threshold for both channels, the mass splitting arising from the sum rules has the same behavior as the observed spectrum. In particular, we obtain m(Ds) - m(Dd) similar to 35 MeV in the 0(-) channel and m(Dd) - m(Ds) similar to 12 MeV in the 0(+) channel at a renormalization scale mu = 1 GeV. The splitting can be attributed to the different roles of mass effects and the parity-dependent "force" induced from nonperturbative QCD vacuum. Further analysis shows that due to this parity-dependent force it is natural that the mass gap of the two states in the 0(-) channel is larger than the 0(+) channel. When we increase the renormalization scale to mu = 1: 3 GeV the splitting remains unchanged which demonstrates a correct scale invariance. Combined with heavy quark effective theory, generalizations to other channels of charmed mesons and b-systems are briefly discussed.
资助项目	NNSFC[10775117] ; NNSFC[10847148]
WOS关键词	EFFECTIVE FIELD-THEORY ; HEAVY-QUARK EXPANSION ; QUANTUM CHROMODYNAMICS ; CURRENT CORRELATORS ; BARYONS ; DECAYS ; CHARM ; INSTANTONS ; PHYSICS ; VACUUM
WOS研究方向	Astronomy & Astrophysics ; Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000276194200052
资助机构	NNSFC
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/31979]
专题	中国科学院近代物理研究所
通讯作者	Jin, Hong-Ying
作者单位	1.Zhejiang Univ, Inst Modern Phys, Hangzhou 310003, Zhejiang, Peoples R China 2.Ningbo Univ, Dept Phys, Ningbo 315211, Zhejiang, Peoples R China 3.Univ Saskatchewan, Dept Phys & Engn Phys, Saskatoon, SK S7N 5E2, Canada
推荐引用方式 GB/T 7714	Jin, Hong-Ying,Zhang, Jin,Zhang, Zhu-Feng,et al. SU(3)-symmetry breaking effects and mass splitting in scalar and pseudoscalar D mesons from QCD sum rules[J]. PHYSICAL REVIEW D,2010,81:12.
APA	Jin, Hong-Ying,Zhang, Jin,Zhang, Zhu-Feng,&Steele, T. G..(2010).SU(3)-symmetry breaking effects and mass splitting in scalar and pseudoscalar D mesons from QCD sum rules.PHYSICAL REVIEW D,81,12.
MLA	Jin, Hong-Ying,et al."SU(3)-symmetry breaking effects and mass splitting in scalar and pseudoscalar D mesons from QCD sum rules".PHYSICAL REVIEW D 81(2010):12.