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Article Dans Une Revue J.Geom.Phys. Année : 2021

Curved Yang–Mills–Higgs gauge theories in the case of massless gauge bosons

Résumé

Alexei Kotov and Thomas Strobl have introduced a covariantized formulation of Yang–Mills–Higgs gauge theories whose main motivation was to replace the Lie algebra with Lie algebroids. This allows the introduction of a possibly non-flat connection ∇ on this bundle, after also introducing an additional 2-form ζ in the field strength. We will study this theory in the simplified situation of Lie algebra bundles, i.e.  only massless gauge bosons, and we will provide a physical motivation of ζ . Moreover, we classify ∇ using the gauge invariance, resulting into that ∇ needs to be a Lie derivation law covering a pairing Ξ , as introduced by Mackenzie. There is also a field redefinition, keeping the physics invariant, but possibly changing ζ and the curvature of ∇ . We are going to study whether this can lead to a classical theory, and we will realize that this has a strong correspondence to Mackenzie’s study about extending Lie algebroids with Lie algebra bundles. We show that Mackenzie’s obstruction class is also an obstruction for having non-flat connections which are not related to a flat connection using the field redefinitions. This class is related to d∇ζ , a tensor which also measures the failure of the Bianchi identity of the field strength and which is invariant under the field redefinition. This tensor will also provide hints about whether ζ can vanish after a field redefinition.
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Dates et versions

hal-03122271 , version 1 (13-02-2023)

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Paternité - Pas d'utilisation commerciale

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Simon-Raphael Fischer. Curved Yang–Mills–Higgs gauge theories in the case of massless gauge bosons. J.Geom.Phys., 2021, 162, pp.104104. ⟨10.1016/j.geomphys.2021.104104⟩. ⟨hal-03122271⟩
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