Fermion soliton stars with asymmetric vacua

Del Grosso, Loris; Pani, Paolo

doi:10.1103/physrevd.108.064042

Cited by 10 publications

(1 citation statement)

References 15 publications

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“…with k 0 = 0 such that ϕ = 0 at the spatial infinity. V(ϕ) could take the asymmetric profile with two asymmetric vacua as shown in Figure 1a when k 3 ̸ = 0, such that V(ϕ) has been utilized to obtain solutions for hairy black holes [35,36] and for the fermionic solitonic star [46]. When the coefficients of terms with odd powers become zero, i.e., k 1 = k 3 = 0, then V(ϕ) can be symmetric with two degenerate minima that look like Higgs-like potentials, 4 such that V(ϕ) has been considered with a phantom field to construct the globally-regular gravitating scalaron with negative ADM mass [28].…”

Section: Theory and Ansätzementioning

confidence: 99%

Gravitating Scalarons with Inverted Higgs Potential

Chew,

Lim

2024

Universe

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Previously, a class of regular and asymptotically flat gravitating scalar solitons (scalarons) has been constructed in the Einstein–Klein–Gordon (EKG) theory by adopting a phantom field with Higgs-like potential where the kinetic term has the wrong sign and the scalaron possesses the negative Arnowitt–Deser–Misner (ADM) mass as a consequence. In this paper, we demonstrate that the use of the phantom field can be avoided by inverting the Higgs-like potential in the EKG system when the kinetic term has a proper sign, such that the corresponding gravitating scalaron can possess the positive ADM mass. We systematically study the basic properties of the gravitating scalaron, such as the ADM mass, the energy conditions, the geodesics of test particles, etc. Moreover, we find that it can be smoothly connected to the counterpart hairy black hole solutions from our recent work in the small horizon limit.

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Section: Theory and Ansätzementioning

confidence: 99%

Gravitating Scalarons with Inverted Higgs Potential

Chew,

Lim

2024

Universe

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Revisiting the fermion-field nontopological solitons

Xie

2024

J. High Energ. Phys.

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Nontopological fermionic solitons exist across a diverse range of particle physics models and have rich cosmological implications. This study establishes a general framework for calculating fermionic soliton profiles under arbitrary scalar potentials, utilizing relativistic mean field theory to accurately depict the interaction between the fermion condensate and the background scalar field. Within this framework, the conventional “fermion bound states” are revealed as a subset of fermionic solitons. In addition, we demonstrate how the analytical formulae in previous studies are derived as special cases of our algorithm, discussing the validity of such approximations. Furthermore, we explore the phenomenology of fermionic solitons, highlighting new formation mechanisms and evolution paths, and reconsidering the possibility of collapse into primordial black holes.

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