Abstract
We expand Hilbert series technologies in effective field theory for the inclusion of massive particles, enabling, among other things, the enumeration of operator bases for non-linearly realized gauge theories. We find that the Higgs mechanism is manifest at the level of the Hilbert series, as expected for the partition function of an S-matrix that is subject to the Goldstone equivalence theorem. In addition to massive vectors, we detail how other massive, spinning particles can be studied with Hilbert series; in particular, we spell out the ingredients for massive gravity in general spacetime dimensions. Further methodology is introduced to enable Hilbert series to capture the effect of spurion fields acquiring vevs. We apply the techniques to the Higgs Effective Field Theory (HEFT), providing a systematic enumeration of its operator basis. This is achieved both from a direct and a custodial symmetry spurion-based approach; we compare and contrast the two approaches, and our results to those appearing in previous literature.
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ArXiv ePrint: 2211.06275
Hamamatsu Professor. (Hitoshi Murayama)
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Gráf, L., Henning, B., Lu, X. et al. Hilbert series, the Higgs mechanism, and HEFT. J. High Energ. Phys. 2023, 64 (2023). https://doi.org/10.1007/JHEP02(2023)064
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DOI: https://doi.org/10.1007/JHEP02(2023)064