Chiral Symmetry in Nuclei -- Theoretical Expectations and Hard Facts

Abstract

It is widely believed that chiral symmetry is restored not only at high temperatures, but also at high nuclear densities. The drop of the order parameter of the chiral phase transition, the chiral condensate, with density has indeed been calculated in various models and is as such a rather robust result. In this talk I point out that the connection of this property with actual observables is far less clear. For this task a good hadronic description of the primary production of hadrons, their propagation inside the nuclear medium, their decay and the propagation of the decay products through the medium to the detector all have to be treated with equal accuracy and weight. In this talk I illustrate with the examples of $\omega$ production and ${\pi }^0{\pi }^0$ production how important in particular final state interactions are.

arXiv commentInvited Talk at Chiral07, Osaka, Japan, Nov. 13 - 16, 2007

References in corpus (17)

• First observation of in-medium modifications of the omega meson
• Hadronic Spectral Functions in Nuclear Matter
• NA60 results on the rho spectral function in In-In collisions
• QCD Sum Rules, Scattering Length and the Vector Mesons in Nuclear Medium
• In-medium modifications of the $\pi \pi$ interaction in photon-induced reactions
• The $\sigma$ meson in a nuclear medium through two pion photoproduction
• The spectral function of the omega meson in nuclear matter from a coupled-channel resonance model
• Attenuation of phi mesons in gamma A reactions
• In-medium spectral change of omega mesons as a probe of QCD four-quark condensate
• Three-body collisions in Boltzmann-Uehling-Uhlenbeck theory
• The influence of the nuclear medium on inclusive electron and neutrino scattering off nuclei
• Low-energy pions in nuclear matter and 2pi photoproduction within a BUU transport model
• omega-nucleus bound states in the Walecka model
• Pion induced double charge exchange reactions in the Delta resonance region
• Double pion photoproduction off 40Ca
• Simultaneous Softening of sigma and rho Mesons associated with Chiral Restoration
• Hadrons in Medium -- Theory confronts experiment

Cited by in corpus (2)

• Hadron properties in the nuclear medium
• Is chiral symmetry manifested in nuclear structure?