The pi -> pi pi process in nuclei and the restoration of chiral symmetry

Abstract

The results of an extensive campaign of measurements of the pi -> pi pi process in the nucleon and nuclei at intermediate energies are presented. The measurements were motivated by the study of strong pi pi correlations in nuclei. The analysis relies on the composite ratio C_{pi pi}^A, which accounts for the clear effect of the nuclear medium on the (pi pi) system. The comparison of the C_{pi pi}^A distributions for the (pi pi)_{I=J=0} and (pi pi)_{I=0,J=2} systems to the model predictions indicates that the C_{pi pi}^A behavior in proximity of the 2m_pi threshold is explainable through the partial restoration of chiral symmetry in nuclei.

arXiv commentaccepted for publication in Nucl. Phys. A

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Cited by in corpus (10)

• Hadron properties in the nuclear medium
• The Chiral Restoration Transition of QCD and Low Mass Dileptons
• Low-Energy Thermal Photons from Meson-Meson Bremsstrahlung
• Photoproduction of mesons off nuclei
• Photoproduction of pi0pi0 and pi0pi+-pairs off the proton from threshold to the second resonance region
• Double pion photoproduction off 40Ca
• Mesonic Content of the Nucleon and the Roper Resonance
• Double pion photoproduction off nuclei - are there effects beyond final-state interaction?
• In-Medium Properties of Hadrons
• Hadrons in Nuclei: Experiments and Perspectives