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On the observable spectrum of theories with a Brout-Englert-Higgs effect

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arxiv 1709.07477 v3 pith:OUCWWKNV submitted 2017-09-21 hep-ph hep-lathep-th

classification hep-phhep-lathep-th
keywords spectrumtheoriesphysicalstateselementarygaugehiggsobservable
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abstract

The physical, observable spectrum in gauge theories is made up from gauge-invariant states. The Fr\"ohlich-Morchio-Strocchi mechanism allows in the standard model to map these states to the gauge-dependent elementary $W$, $Z$ and Higgs states. This is no longer necessarily the case in theories with a more general gauge group and Higgs sector. We classify and predict the physical spectrum for a wide range of such theories, with special emphasis on GUT-like cases, and show that discrepancies between the spectrum of elementary fields and physical particles frequently arise.

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  1. The observable spectrum for GUT-like theories

    hep-lat 2025-01 conditional novelty 6.0 of 10

    Lattice simulations of an SU(3) gauge theory with a fundamental Higgs reveal new parity-degenerate and charged states that ordinary perturbation theory does not predict.

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