Possible chiral doublets in 60Ni

Parity doublets and chiral symmetry restoration in baryon spectrum

It is argued that an appearance of the near parity doublets in the upper part of the light baryon spectrum is an evidence for the chiral symmetry restoration in the regime where a typical momentum of quarks is around the chiral symmetry breaking scale. Thus one observes a phase transition in the upper part of the light baryon spectrum. The average kinetic energy of the constituent quarks in thi...

Possible Interference Phenomena between Parity Doublets

Possible interference phenomena between parity doublets are discussed. In particular, the decay particle distributions of Z+ and A' produced in E +p capture and in x +p collision are analyzed. These distributions may have interference terms with odd parity. Experimental detection of such terms would constitute an unambiguous proof of the existence of parity doublets. It is further pointed out t...

Doublets in Translation

Do parity doublets in the baryon spectrum reflect restoration of chiral symmetry ?

We discuss the mass spectrum of highly-excited nucleon and ∆ * resonances. The spectrum exhibits parity doublets, pairs of resonances of identical total angular momentum J but of opposite parity. It has been proposed that the parity doublets evidence restoration of chiral symmetry at large baryon excitation energies. We compare this conjecture with the possibility that high-mass states are orga...

A Possible Lattice Chiral Gauge Theory

We analyze the dynamics of an SUL(2)⊗UR(1) chiral gauge theory on a lattice with a large multifermion coupling 1 ≪ g2 < ∞. It is shown that no spontaneous symmetry breaking occurs; the “spectator” fermion ψR(x) is a free mode; doublers are decoupled as massive Dirac fermions consistently with the chiral gauge symmetry. Whether right-handed three-fermion states disappear and chiral fermions emer...