Hadrons in Medium -- Theory confronts experiment

Abstract

In this talk we briefly summarize our theoretical understanding of in-medium selfenergies of hadrons. With the special case of the $\omega$ meson we demonstrate that earlier calculations that predicted a significant lowering of the mass in medium are based on an incorrect treatment of the model Lagrangian; more consistent calculations lead to a significant broadening, but hardly any mass shift. We stress that the experimental reconstruction of hadron spectral functions from measured decay products always requires knowledge of the decay branching ratios which may also be strongly mass-dependent. It also requires a quantitatively reliable treatment of final state interactions which has to be part of any reliable theory.

Key Lecture at YKIS2006, Kyoto, Dec. 2006

Cited by in corpus (9)

• Hadron properties in the nuclear medium
• Hadrons in strongly interacting matter
• Meson-nucleus potentials and the search for meson-nucleus bound states
• In-medium $\omega$ mass from the $\gamma +Nb\to {\pi }^0\gamma +X$ reaction
• Medium Modifcations of Mesons in Elementary Reactions and Heavy-Ion Collisions
• Experimental approaches for determining in-medium properties of hadrons from photo-nuclear reactions
• The width of the omega meson in the nuclear medium
• The $\pi \rho$ Cloud Contribution to the $\omega$ Width in Nuclear Matter
• Chiral Symmetry in Nuclei -- Theoretical Expectations and Hard Facts