0++ scalar glueball in finite-width Gaussian sum rules
作者： Shuiguo Wen , Zhenyu Zhang , Jueping Liu , None
DOI: 10.1103/PHYSREVD.82.016003
关键词: Quark 、 Instanton 、 Gauss sum 、 Physics 、 Scalar (mathematics) 、 Quantum mechanics 、 Gluon 、 Quantum field theory 、 Quantum chromodynamics 、 Glueball
摘要: Based on a semiclassical expansion for quantum chromodynamics in the instanton liquid background, correlation function of 0{sup ++} scalar glueball current is given, and properties are studied framework Gaussian sum rules. Besides pure classical contributions, contributions arising from interactions between fields gluons come into play. Instead usual zero-width approximation resonance, Breit-Wigner form spectral finite-width resonance adopted. The family rules with without light quarks studied. A consistency subtracted unsubtracted very well justified, values decay width coupling to corresponding which fraction dominant, obtained.
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