Scattering of fermions on a one-dimensional Q-ball

Loginov, A.

doi:10.1016/j.nuclphysb.2022.115964

Cited by 4 publications

(1 citation statement)

References 35 publications

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“…Such objects have been studied in various contexts since their conception-decay of such objects when couplings to other fields are introduced [37], their small charge limits [38], as dark matter candidates [39,40], in the context of supersymmetry and baryogenesis [41], cosmological phase transitions [42], spinning Q-balls [43] and so forth. Interest in such objects has persisted, and they have also been subjects of many dedicated recent studies, for instance, in the context of generating lepton asymmetry and enhanced gravitational waves during Q-ball decay [44], Q-ball superradiance [45], stress stability criteria in gauged Q-balls [46], fermion scattering solutions for one-dimensional Q-balls [47], topological and non-topological charged Q-monopole-balls [48], and many others.…”

Section: Introductionmentioning

confidence: 99%

Q-balls in the sky

Ansari¹,

Bhandari²,

Thalapillil³

2023

Preprint

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There may exist extended configurations in the dark matter sector that are analogues of structures in the visible sector. In this work, we explore non-topological solitonic configurations, specifically Q-balls, and study when they may form macroscopic astrophysical structures and what their distinct characteristics might be. We study in some detail theoretical bounds on their sizes and constraints on the underlying parameters, based on criteria for an astrophysical Q-ball's existence, gravitational stability and viability of solutions. Following this path, one is able to obtain novel limits on astrophysical Q-ball sizes and their underlying parameters. We also explore the gravitational lensing features of different astrophysical Q-ball profiles, which are more general than the simple thin-wall limit. It is seen that the magnification characteristics may be very distinct, depending on the actual details of the solution, even for astrophysical Q-balls having the same size and mass. Assuming that such astrophysical Q-balls may form a small component of the dark matter in the universe, we place limits on this fraction from the gravitational microlensing surveys EROS-2, OGLE-IV and the proposed future survey WFIRST. Exploring various astrophysical Q-ball profiles and sizes, it is found that while for smaller masses, the dark matter fraction comprising astrophysical Q-balls is at most sub-percent, for larger masses, it may be significantly higher.

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Section: Introductionmentioning

confidence: 99%

Q-balls in the sky

Ansari¹,

Bhandari²,

Thalapillil³

2023

Preprint

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Fermion scattering on topological solitons in theCPN−1model

Loginov

2023

Phys. Rev. D

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Q -balls in the sky

Ansari,

Bhandari,

Thalapillil

2024

Phys. Rev. D

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There may exist extended configurations in the dark matter sector that are analogs of structures in the visible sector. In this work, we explore nontopological solitonic configurations, specifically Q-balls, and study when they may form macroscopic astrophysical structures and what their distinct characteristics might be. We study in some detail theoretical bounds on their sizes and constraints on the underlying parameters, based on criteria for an astrophysical Q-ball’s existence, gravitational stability and viability of solutions. Following this path, one is able to obtain novel limits on astrophysical Q-ball sizes and their underlying parameters. We also explore the gravitational lensing features of different astrophysical Q-ball profiles, which are more general than the simple thin-wall limit. It is seen that the magnification characteristics may be very distinct, depending on the actual details of the solution, even for astrophysical Q-balls having the same size and mass. Assuming that such astrophysical Q-balls may form a small component of the dark matter in the Universe, we place limits on this fraction from the gravitational microlensing surveys EROS-2, OGLE-IV, HSC-Subaru and the proposed future survey WFIRST. Exploring various astrophysical Q-ball profiles and sizes, it is found that while for most intermediate masses that we consider, the dark matter fraction comprising astrophysical Q-balls is at most subpercent, for other masses it may be significantly higher. Published by the American Physical Society 2024

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Scattering of fermions on a one-dimensional Q-ball

Cited by 4 publications

References 35 publications

Q-balls in the sky

Q-balls in the sky

Fermion scattering on topological solitons in theCPN−1model

Q -balls in the sky

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