Multiple chiral doublets in four-j shells particle rotor model: Five possible chiral doublets in 60136Nd76

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...

Doublets in Translation

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...

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...

Spontaneous CP violation in supersymmetric models with four Higgs doublets.

We consider supersymmetric extensions of the standard model with two pairs of Higgs doublets. We study the possibility that CP violation is generated spontaneously in the scalar sector via vacuum expectation values (VEVs) of the Higgs fields. Using a simple geometrical interpretation of the minimum conditions we prove that the minimum of the tree-level scalar potential for these models is allwa...