期刊
SCIPOST PHYSICS
卷 6, 期 1, 页码 -出版社
SCIPOST FOUNDATION
DOI: 10.21468/SciPostPhys.6.1.008
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资金
- Simons Foundation [488655]
- Mitsubishi Heavy Industries
- Isaac Newton Institute for Mathematical Sciences
- EPSRC [EP/R014604/1]
- EPSRC [EP/R014604/1] Funding Source: UKRI
Fixed points of scalar field theories with quartic interactions in d = 4 - epsilon dimensions are considered in full generality. For such theories it is known that there exists a scalar function A of the couplings through which the leading-order beta-function can be expressed as a gradient. It is here proved that the fixed-point value of A is bounded from below by a simple expression linear in the dimension of the vector order parameter, N. Saturation of the bound requires a marginal deformation, and is shown to arise when fixed points with the same global symmetry coincide in coupling space. Several general results about scalar CFTs are discussed, and a review of known fixed points is given.
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