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Tetraquarks, hadronic molecules, meson-meson scattering, and disconnected contributions in lattice QCD
Guo, FK; Liu, LM; Meissner, UG; Wang, P;王平(理)
2013
发表期刊PHYSICAL REVIEW D
卷号88期号:7页码:74506
摘要There are generally two types of Wick contractions in lattice QCD calculations of a correlation function: connected and disconnected ones. The disconnected contribution is difficult to calculate and noisy, thus it is often neglected. In the context of studying tetraquarks, hadronic molecules, and mesonmeson scattering, we show that whenever there are both connected and singly disconnected contractions, the singly disconnected part gives the leading order contribution, and thus should never be neglected. As an explicit example, we show that information about the scalar mesons sigma, f(0)(980), a(0)(980), and kappa will be lost when neglecting the disconnected contributions.
学科领域Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.88.074506
收录类别SCI
WOS记录号WOS:000326110400007
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被引频次:16[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/311005/224589
专题理论物理室
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Guo, FK,Liu, LM,Meissner, UG,et al. Tetraquarks, hadronic molecules, meson-meson scattering, and disconnected contributions in lattice QCD[J]. PHYSICAL REVIEW D,2013,88(7):74506.
APA Guo, FK,Liu, LM,Meissner, UG,&Wang, P;王平.(2013).Tetraquarks, hadronic molecules, meson-meson scattering, and disconnected contributions in lattice QCD.PHYSICAL REVIEW D,88(7),74506.
MLA Guo, FK,et al."Tetraquarks, hadronic molecules, meson-meson scattering, and disconnected contributions in lattice QCD".PHYSICAL REVIEW D 88.7(2013):74506.
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