Soft Pions in Large Boxes
Sep 29, 198717 pages
Published in:
- Nucl.Phys.B 300 (1988) 180-196
- Published: 1988
Report number:
- RU-42-87
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Abstract: (Elsevier)
In this paper we deal with the linear O( N ) σ -model in four dimensions in the broken phase. It is argued that the zero-momentum two-point function in a finite box obeys a soft-pion finite-size theorem which holds if the boundary conditions are periodic. The theorem's validity depends only on the structure of the would-be massless sector of the model.- FIELD THEORETICAL MODEL: SIGMA
- LINEAR
- SYMMETRY: O(N)
- TWO-POINT FUNCTION
- EXPANSION 1/N
- LATTICE FIELD THEORY
- CURRENT ALGEBRA: EFFECTIVE LAGRANGIANS
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