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- W1586103688 abstract "QCD Laplace sum-rules for light-quark I=0,1 scalar currents are used to investigate candidates for the lightest $qbar q$ scalar mesons. The theoretical predictions for the sum-rules include instanton contributions which split the degeneracy between the I=0 and I=1 channels. The self-consistency of the theoretical predictions is verified through a Holder inequality analysis, confirming the existence of an effective instanton contribution to the continuum. The sum-rule analysis indicates that the f_0(980) and a_0(1450) should be interpreted as the lightest $qbar q$ scalar mesons. This apparent decoupling of the f_0(400-1200) (or $sigma$) and a_0(980) from the quark scalar currents suggests a non-$qbar q$ interpretation of these resonances." @default.
- W1586103688 created "2016-06-24" @default.
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- W1586103688 date "1999-05-11" @default.
- W1586103688 modified "2023-09-27" @default.
- W1586103688 title "QCD Sum-Rule Invisibility of the sigma Meson" @default.
- W1586103688 hasPublicationYear "1999" @default.
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