QCD sum rule analysis for light vector and axial - vector mesons in vacuum and nuclear matter ∗ Stefan Leupold
نویسنده
چکیده
Extending previous work we study the constraints of QCD sum rules on mass and width of light vector and axial-vector mesons in vacuum and in a medium with finite nuclear density. For the latter case especially the effect of nuclear pions leading to vector–axial-vector mixing is included in the analysis. PACS numbers: 14.40.Cs, 21.65.+f, 11.30.Rd, 24.85.+p
منابع مشابه
What QCD sum rules tell about the rho meson ∗
Using a simple parametrization of Breit-Wigner type for the hadronic side of the QCD sum rule for ρ mesons in vacuum as well as in a nuclear medium we explore the range of values for the mass and the width of the ρ meson which are compatible with the operator product expansion. PACS numbers: 24.85.+p, 21.65.+f, 12.38.Lg, 14.40.Cs Typeset using REVTEX ∗Work supported by GSI Darmstadt and BMBF.
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