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Bethe-Salpeter equation for heavy baryons omega((*))(Q) in the diquark picture
Guo XH(郭新恒); Guo, XH; Thomas, AW; Williams, AG
1999
发表期刊PHYSICAL REVIEW D
卷号59期号:11页码:116007
通讯作者Univ Adelaide, Dept Phys & Math Phys, Adelaide, SA 5005, Australia ; Univ Adelaide, Special Res Ctr Subatom Struct Matter, Adelaide, SA 5005, Australia ; Acad Sinica, Inst High Energy Phys, Beijing 100039, Peoples R China
文章类型Article
摘要In the heavy quark limit, the heavy baryons omega(Q)((*)) (omega stands for Sigma, Xi or Omega and Q = b or c) are regarded as composed of a heavy quark and an axial vector, light diquark with good spin and isospin quantum numbers. Based on this diquark picture we establish the Bethe-Salpeter (BS) equation for omega(Q)((*)) in the limit where the heavy quark has infinite mass, m(Q)-->(infinity). It is found that in this limit there are three components in the BS wave function for omega(Q)((*)). Assuming the kernel to consist of a scalar confinement term and a one-gluon-exchange term we derive three coupled integral equations for the three BS scalar functions in the covariant instantaneous approximation. Numerical solutions for the three BS scalar functions are presented, including a discussion of their dependence on the various input parameters. These solutions are applied to calculate the Isgur-Wise functions xi(omega) and zeta(omega) for the weak transitions Omega(b)((*)) --> Omega(c)((*)). Using these we give predictions for the Cabibbo-allowed nonleptonic decay widths and up-down asymmetries for Omega(b)-->Omega(c)((*)) plus a pseudoscalar or vector meson. [S0556-2821(99)07909-6].
学科领域Astronomy & Astrophysics; Physics
研究领域[WOS]Astronomy & Astrophysics ; Physics ; Astronomy & Astrophysics ; Physics
DOI10.1103/PhysRevD.59.116007
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语种英语
研究领域[WOS]Astronomy & Astrophysics ; Physics ; Astronomy & Astrophysics ; Physics
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000080778900067
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被引频次:23[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/240962
专题理论物理室
作者单位中国科学院高能物理研究所
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Guo XH,Guo, XH,Thomas, AW,et al. Bethe-Salpeter equation for heavy baryons omega((*))(Q) in the diquark picture[J]. PHYSICAL REVIEW D,1999,59(11):116007.
APA 郭新恒,Guo, XH,Thomas, AW,&Williams, AG.(1999).Bethe-Salpeter equation for heavy baryons omega((*))(Q) in the diquark picture.PHYSICAL REVIEW D,59(11),116007.
MLA 郭新恒,et al."Bethe-Salpeter equation for heavy baryons omega((*))(Q) in the diquark picture".PHYSICAL REVIEW D 59.11(1999):116007.
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