ar X iv : h ep - p h / 95 02 30 5 v 1 1 5 Fe b 19 95 RYUTHP 95 - 1 February 1995 Chiral Symmetry and Scalar Meson in
نویسنده
چکیده
After giving a short introduction to the Nambu-Jona-Lasinio model with an anomaly term, we show the importance of the scalar-scalar correlation in the low-energy hadron dynamics, which correlation may be summarized by a scalar-isoscalar meson, the sigma meson. The discussion is based on the chiral quark model with the sigma-meson degrees of freedom. Possible experiments are proposed to produce the elusive meson in a nucleus and detect it. In relation to a precursory soft mode for the chiral transition, the reason is clarified why the dynamic properties of the superconductor may be described by the diffusive time-dependent Ginzburg-Landau (TDGL) equation. We indicate the chiral symmetry plays a significant role also in nuclei; one may say that the stability of nuclei is due to the chiral symmetry of QCD. 1 Invited talk presented at YITP workshop on " From Hadronic Matter to Quark Matter: Evolution of Hadronic Matter ". Originally, the talk was entitled " Hadron Properties and Chiral Transition in an Effective Theory " by the organizers of the workshop.
منابع مشابه
ar X iv : h ep - t h / 95 06 14 5 v 1 2 1 Ju n 19 95 PURD - TH - 95 - 02 The Supercurrent In Supersymmetric Field Theories
A supercurrent superfield whose components include a conserved energy-momentum tensor and supersymmetry current as well as a (generally broken) R-symmetry current is constructed for a generic effective N=1 supersymmet-ric gauge theory. The general form of the R-symmetry breaking is isolated. Included within the various special cases considered is the identification of those models which exhibit...
متن کاملar X iv : h ep - p h / 95 02 30 3 v 3 2 7 A pr 1 99 5 New Universality Classes for Quantum Critical Behavior
We use the epsilon expansion to explore a new universality class of second order quantum phase transitions associated with a four-dimensional Yukawa field theory coupled to a traceless Hermitean matrix scalar field. We argue that this class includes four-fermi models in 2 < D < 4 dimensions with SU (N F) × U (N) symmetry and a
متن کاملar X iv : h ep - p h / 95 09 23 2 v 1 6 S ep 1 99 5 TKU - 95 - 1 July 1995 SPECTROSCOPY AND DECAYS OF HEAVY MESONS ∗
Assuming Coulomb-like as well as confining scalar potential, we have solved Shrödinger equation perturbatively in 1/mQ with a heavy quark mass mQ. The lowest order equation is examined carefully. Mass levels are fitted with experimental data for D/B mesons at each level of perturbation. Meson wave functions obtained thereby can be used to calculate ordinary form factors as well as Isgur-Wise fu...
متن کاملar X iv : h ep - p h / 95 01 29 1 v 2 4 A pr 1 99 5 EFI - 95 - 02 January 1995 hep - ph / 9501291 CHARM AND BEAUTY IN PARTICLE PHYSICS
The spectra of states containing charmed and beauty quarks, and their regularities, are reviewed.
متن کامل