Renormalization group equations in a model of generalized hidden local symmetry and restoration of chiral symmetry
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization, 1-1, Ooho, Tsukuba, Ibaraki, 305-0801 (Japan)
- Radiation Laboratory, RIKEN, Wako, Saitama, 351-0198 (Japan)
We study possible restoration patterns of chiral symmetry in a generalized hidden local symmetry model, which is a low-energy effective theory of QCD including pseudoscalar, vector and axial-vector mesons. We derive Wilsonian renormalization-group equations and analyze the running couplings and their fixed points at the chiral restoration point. We find three types of the chiral restoration, which are classified as the standard, vector manifestation and intermediate scenarios, respectively. It turns out that the rho and A{sub 1} meson become massless and their decay into pion is suppressed in all the restoration patterns. Each restoration scenario violates or fulfills the vector-meson dominance at the critical point in a different manner, which may reflect on the contributions from the pion to the dilepton spectrum.
- OSTI ID:
- 20776696
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 73, Issue 3; Other Information: DOI: 10.1103/PhysRevD.73.036004; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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