Compact Q-balls and Q-shells in a multi-component ℂPN model

Klimas, P.; Kubaski, L.C.; Sawado, Nobuyuki; Yanai, Shota

doi:10.1007/jhep09(2021)084

Cited by 3 publications

(2 citation statements)

References 62 publications

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“…They may exist only for a given set of parameters of the model. Analogous Q-shell configurations are also known in several gauged models coupled to gravity, where they may also harbor a black hole [41,[52][53][54][55][56].…”

Section: A Gauged Emfls Boson Starsmentioning

confidence: 85%

Kerr black holes with synchronised scalar hair and boson stars in the Einstein-Friedberg-Lee-Sirlin model

Kunz

Perapechka

Shnir

2019

J. High Energ. Phys.

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We consider the Friedberg-Lee-Sirlin model minimally coupled to Einstein gravity in four spacetime dimensions. The renormalizable Friedberg-Lee-Sirlin model consists of two interacting scalar fields, where the mass of the complex scalar field results from the interaction with the real scalar field which has a finite vacuum expectation value. We here study a new family of self-gravitating axially-symmetric, rotating boson stars in this model. In the flat space limit these boson stars tend to the corresponding Q-balls. Subject to the usual synchronization condition, the model admits spinning hairy black hole solutions with two different types of scalar hair. We here investigate parity-even and parity-odd boson stars and their associated hairy black holes. We explore the domain of existence of the solutions and address some of their physical properties. The solutions exhibit close similarity to the corresponding boson stars and Kerr black holes with synchronised scalar hair in the O(3)-sigma model coupled to Einstein gravity and to the corresponding solutions in the Einstein-Klein-Gordon theory with a complex scalar field, where the latter are recovered in a limit. arXiv:1904.13379v2 [gr-qc] 9 May 2019where the scalar field possesses a harmonic time dependence [1,2].Similar static localized field configurations with finite energy exist in Einstein-Skyrme theory [3][4][5] and in SU(2) Einstein-Yang-Mills theory [6] or Einstein-Yang-Mills-Higgs theory [7][8][9][10]. Certain types of localized gravitating solutions, like boson stars with appropriate interactions, or gravitating monopoles, sphalerons and Skyrmions, are linked to the corresponding flat space solutions, which represent topological solitons/Q-balls [11,12], or monopoles [13,14], sphalerons [15], and Skyrmions [16], respectively.In particular, the Friedberg-Lee-Sirlin model [11] provides an interesting example of a simple renormalizable two-component scalar field theory with natural interaction terms. In this model the complex scalar becomes massive due to the coupling with the real scalar field, since the latter has a finite vacuum expection value generated via a symmetry breaking potential. The Q-ball solutions of this model then appear because of the phase rotation of the complex scalar field, and the coupling to gravity leads to the respective boson stars.Gravitating localized solutions of another type are bound by gravity. Examples are boson stars without appropriate self-interactions [1, 2], or the Bartnik-McKinnon solutions [6]. These do not possess a flat space limit.All these self-gravitating configurations exist for a certain range of values of the parameters of the respective theory, For instance, there are two branches of self-gravitating Skyrmions [4,5], where the lower in energy branch is linked to the flat space Skyrmion in the limit of a vanishing effective gravitational coupling. This lower branch of solutions then ends at some critical maximal value of the gravitational coupling, where it bifurcates with the second, higher in energy branch...

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Section: A Gauged Emfls Boson Starsmentioning

confidence: 85%

Kerr black holes with synchronised scalar hair and boson stars in the Einstein-Friedberg-Lee-Sirlin model

Kunz

Perapechka

Shnir

2019

J. High Energ. Phys.

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“…In the last few years, we made some efforts in the study of compact Q-balls in the nonlinear sigma model on a target space CP N , and also the boson stars corresponding to the model [18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Nodal compact $Q$-ball/$Q$-shell in the $\mathbb{C}P^N$ nonlinear sigma model

Klimas,

Sawado,

Yanai

2022

Preprint

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Nodal, excited compactons in the CP N models with V-shaped potentials are analyzed.It is shown that the solutions exist as compact Q-balls and Q-shells. The solutions have a discontinuity in the second derivative associated with the character of the potential, however, their energy and charge densities are both continuous. The excited Q-balls and Q-shells are analyzed as electrically neutral and electrically charged objects.

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