Four point renormalized coupling constant in O(N) models
- ,
- ,
- Paolo Rossi(,)
- Pisa U. and
- INFN, Pisa
47 pages
Published in:
- Nucl.Phys.B 459 (1996) 207-242
e-Print:
- hep-lat/9506002 [hep-lat]
Report number:
- IFUP-TH-24-95
View in:
Citations per year
Abstract: (DESY)
The renormalized zero-momentum four-point coupling of O(N)-invariant scalar field theories in dimensions is studied by applying the 1/N expansion and strong coupling analysis. The O(1/N) correction to the -function and to the fixed point value are explictly computed. Strong coupling series for lattice non-linear sigma models are analyzed near criticality in d=2 and d=3 for several values of and the corresponding values of are extracted. Large-N and strong coupling results are compared with each other, finding a good general agreement. For small N the strong coupling analysis in 2-d gives the best determination of to date (or comparable for N=2,3 with the available Monte Carlo estimates), and in 3-d it is consistent with available field theory results.- 11.10 Kk
- 11.15 Pg
- 64.60 Fr
- 75.10 Hk
- field theory: scalar
- symmetry: O(N)
- dimension: 2
- dimension: 3
- coupling constant
- expansion 1/N
References(37)
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