Pseudoscalar mesons in nuclei and partial restoration of chiral symmetry

Abstract

Recent theoretical developments of hadrons in nuclei are briefly reviewed in the aspect of chiral symmetry in nuclei. We show a general sum rule connecting in-medium hadronic quantities and quark condensate, emphasizing that both pionic mode and particle-hole excitations in the nuclear medium are responsible for reduction of the chiral condensate in nuclear matter. We also discuss that few-body nuclear systems with kaons are good objects to investigate basic features of kaon-nucleus interactions, showing recent understandings of the structure of Lambda(1405) and possible bound states of KbarNN and KKbarN. We also mention eta mesonic nuclei in connection with chiral symmetry of baryons.

arXiv comment6 pages. Talk given at New Frontiers in QCD 2010: Exotic Hadron Systems and Dense Matter, Kyoto, Japan, 18 Jan - 19 Mar 2010

References in corpus (12)

• Chiral Dynamics of the Two Λ(1405) States
• Faddeev calculation of a $K^{-}pp$ quasi-bound state
• $K^{-}pp$ system with chiral SU(3) effective interaction
• Chiral Dynamics of Deeply Bound Pionic Atoms
• Kaonic production of Lambda(1405) off deuteron target in chiral dynamics
• Chiral Symmetry for Positive and Negative Parity Nucleons
• In-medium Pion and Partial Restoration of Chiral Symmetry
• Formation of $\eta$-mesic Nuclei Using the Recoilless (d,${}^3$He) Reaction
• Searching for signatures around 1920 MeV of a $N^{\ast }$ state of three hadron nature
• The in-medium isovector pi N amplitude from low energy pion scattering
• Level crossing of particle-hole and mesonic modes in eta mesic nuclei
• Wave packet revivals in a graphene quantum dot in a perpendicular magnetic field