The Vector Current Correlator
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چکیده
منابع مشابه
On Qcd Sum Rules for Vector Mesons in Nuclear Medium *
Vector mesons show up in the electromagnetic current-current correlator. QCD sum rules provide a constraint on hadronic models for this correlator. This constraint is discussed for the case of finite nuclear density concerning the longitudinal as well as the transverse part of the current-current correlator at finite three-momentum. PACS numbers: 24.85.+p, 21.65.+f, 12.38.Lg, 14.40.Cs
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In this contribution three-loop QCD corrections to current correlators are considered. The application of the large momentum procedure, which provides a systematic expansion in (m/q), allows the computation of terms up to n = 6 for the vector and axial-vector correlator and up to n = 4 for the scalar and pseudo-scalar correlator. Some physical applications are discussed. There are plenty of imp...
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تاریخ انتشار 2007