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arXiv 0905.2211hep-thhep-ph
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共形算子维数的泛约束

Universal Constraints on Conformal Operator Dimensions

Vyacheslav S. Rychkov, Alessandro Vichi

摘要:

我们继续研究在arXiv:0807.0004中开始的四维酉共形场论的模型无关约束。我们的主要结果是改进了出现在两个d维全同标量的OPE中的首标算子的维数Δ的上界。在1<d<1.7的区间内,这个普适界的形式为Δ<2+0.7(d-1)^{1/2}+2.1(d-1)+0.43(d-1)^{3/2}。证明是基于CFT的主要原则:酉性,交叉对称性,OPE和共形块分解。我们还讨论了可能的应用粒子唯象学,并通过2-D模拟,弦论。

英文摘要:

We continue the study of model-independent constraints on the unitary Conformal Field Theories in 4-Dimensions, initiated in arXiv:0807.0004. Our main result is an improved upper bound on the dimension Δof the leading scalar operator appearing in the OPE of two identical scalars of dimension d. In the interval 1<d<1.7 this universal bound takes the form Δ<2+0.7(d-1)^{1/2}+2.1(d-1)+0.43(d-1)^{3/2}. The proof is based on prime principles of CFT: unitarity, crossing symmetry, OPE, and conformal block decomposition. We also discuss possible applications to particle phenomenology and, via a 2-D analogue, to string theory.

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