Singularity Problem for Interacting Massive Vectors
TL;DR: In this article , the authors obtain a new condition on the validity of the classical limit of these theories related to the nontrivial constraints that exist for vector field components and show that gauge-invariant interactions are generally safe from this problem, even though the mass term explicitly breaks the gauge symmetry.
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Abstract: Interacting massive spin-1 fields have been widely used in cosmology and particle physics. We obtain a new condition on the validity of the classical limit of these theories related to the nontrivial constraints that exist for vector field components. A violation of this consistency condition causes a singularity in the time derivative of the auxiliary component and could impact, for example, the field's cosmic history and superradiance around black holes. We show that gauge-invariant interactions are generally safe from this problem, even though the mass term explicitly breaks the gauge symmetry. Such restrictions for interactions are expected to exist generically in many other nontrivially constrained systems.
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TL;DR: In this paper , the authors used fully nonlinear numerical evolutions of ultracompact bosonic stars free of any other known instabilities and introducing a novel adiabatic effective potential technique to confirm the LRs triggered instability, identifying two possible fates: migration to non-ultracompact configurations or collapse to BHs.
Ghost Instabilities in Self-Interacting Vector Fields: The Problem with Proca Fields.
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Spontaneous scalarization
Daniela D. Doneva,Fethi M. Ramazanoğlu,Hector O. Silva,Thomas P. Sotiriou,Stoytcho S. Yazadjiev +4 more
TL;DR: Recent astrophysical observations offer a chance to test gravity's strong-field regime, potentially revealing deviations from general relativity. Spontaneous scalarization, a scalar-field mechanism, induces measurable effects in strong-field regimes while remaining undetectable in weak-field experiments.
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Proca-Higgs balls and stars in a UV completion for Proca self-interactions
TL;DR: In this article , the authors considered a Proca-Higgs model where a complex vector field gains mass via spontaneous symmetry breaking, by coupling to a real scalar field with a Higgs-type potential.
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Coordinate Singularities of Self-Interacting Vector Field Theories
12 Jan 2023
TL;DR: In this article , it was shown that the vector constraint equation cannot be satisfied beyond a point where the breakdown occurs, and the dynamics is governed by an effective metric that becomes singular at the breakdown.
References
Oxford University Press : Review of Particle Physics, 2020-2021
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