Chiral Partners and their Electromagnetic Radiation -- Ingredients for a systematic in-medium calculation

Abstract

It is argued that the chiral partners of the lowest-lying hadrons are hadronic molecules and not three-quark or quark-antiquark states, respectively. As an example the case of a_1 as the chiral partner of the rho is discussed. Deconfinement -- or as a precursor large in-medium widths for hadronic states -- is proposed as a natural way to accommodate for the fact that at chiral restoration the respective in-medium spectra of chiral partners must become degenerate. Ingredients for a systematic and self-consistent in-medium calculation are presented with special emphasis on vector-meson dominance which emerges from a recently proposed systematic counting scheme for the mesonic sector including pseudoscalar and vector mesons as active degrees of freedom.

revised version: more references added

References in corpus (8)

• Low lying axial-vector mesons as dynamically generated resonances
• On meson resonances and chiral symmetry
• Origin of resonances in the chiral unitary approach
• Hadronic Spectral Functions in Nuclear Matter
• On the radiative decays of light vector and axial-vector mesons
• Antikaons and hyperons in nuclear matter with saturation
• Information on the structure of the a1 from tau decay
• Selfconsistent approximations, symmetries and choice of representation

Cited by in corpus (3)

• Hadrons in strongly interacting matter
• Nature of the sigma meson as revealed by its softening process
• The rho meson in a scenario of pure chiral restoration