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Title of article :
Instanton and higher-loop perturbative contributions to the QCD sum-rule analysis of pseudoscalar gluonium Original Research Article
Author/Authors :
Ailin Zhang، نويسنده , , T.G. Steele، نويسنده ,
Issue Information :
هفته نامه با شماره پیاپی سال 2003
Pages :
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Abstract :
Instanton effects and three-loop perturbative contributions are incorporated into QCD sum-rule analyses of pseudoscalar (JPC=0−+) gluonium. Gaussian sum-rules are shown to be superior to Laplace sum-rules in optimized predictions for pseudoscalar gluonium states in the presence of instanton contributions. The Gaussian sum-rule analysis yields a pseudoscalar mass of (2.65±0.33) GeV and width bounded by Γ<530 MeV. The Laplace sum-rules provide corroborating evidence in support of the ≈2.7 GeV mass scale.
Keywords :
Instantons , Glueballs , Pseudoscalar gluonium , QCD sum-rules
Journal title :
Nuclear physics A
Serial Year :
Link To Document :