Instanton interpolating current for σ-tetraquark
نویسندگان
چکیده
منابع مشابه
Instanton interpolating current for σ–tetraquark
We perform a QCD sum rule analysis for the light scalar meson σ (f0(600)) with a tetraquark current related to the instanton picture for QCD vacuum. We demonstrate that instanton current, including equal weights of scalar and pseudoscalar diquarkantidiquarks, leads to a strong cancelation between the contributions of high dimension operators in the operator product expansion (OPE). Furthermore,...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2006
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2006.09.049