Physical Review Letters
Physical Review Letters
5 years ago

Ward Identity and Scattering Amplitudes for Nonlinear Sigma Models

Ward Identity and Scattering Amplitudes for Nonlinear Sigma Models
Ian Low, Zhewei Yin
We present a Ward identity for nonlinear sigma models using generalized nonlinear shift symmetries, without introducing current algebra or coset space. The Ward identity constrains correlation functions of the sigma model such that the Adler’s zero is guaranteed for $S$-matrix elements, and gives ri...

Publisher URL: http://link.aps.org/doi/10.1103/PhysRevLett.120.061601

DOI: 10.1103/PhysRevLett.120.061601

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