Nonperturbative renormalization group in a light-front three-dimensional real scalar model
- Department of Physics, Kyushu University, Fukuoka 812-81 (Japan)
- University of Fisheries, Shimonoseki 759-65 (Japan)
The three-dimensional real scalar model, in which the Z{sub 2} symmetry spontaneously breaks, is renormalized in a nonperturbative manner based on the Tamm-Dancoff truncation of Fock space. A critical line is calculated by diagonalizing the Hamiltonian regularized with basis functions. The marginal ({phi}{sup 6}) coupling dependence of the critical line is weak. In the broken phase the canonical Hamiltonian is tachyonic, so the field is shifted as {phi}(x){r_arrow}{var_phi}(x)+v. The shifted value v is determined as a function of running mass and coupling so that the mass of the ground state vanishes. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 467479
- Journal Information:
- Physical Review, D, Vol. 55, Issue 4; Other Information: PBD: Feb 1997
- Country of Publication:
- United States
- Language:
- English
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