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High Energy Physics - Theory

arXiv:1805.03518 (hep-th)
[Submitted on 7 May 2018 (v1), last revised 29 Nov 2018 (this version, v2)]

Title:Vibrational modes of Q-balls

Authors:A. Kovtun, E. Nugaev, A. Shkerin
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Abstract:We study linear perturbations of classically stable Q-balls in theories admitting analytic solutions. Although the corresponding boundary value problem is non-Hermitian, the analysis of perturbations can also be performed analytically in certain regimes. We show that in theories with the flat potential, large Q-balls possess soft excitations. We also find a specific vibrational mode for Q-balls with a near-critical charge, where the perturbation theory for excitations can be developed. Comparing with the results on stability of Q-balls provides additional checks of our analysis.
Comments: 15 pages, 5 figures; journal version
Subjects: High Energy Physics - Theory (hep-th); High Energy Physics - Phenomenology (hep-ph)
Report number: INR-TH-2018-010
Cite as: arXiv:1805.03518 [hep-th]
  (or arXiv:1805.03518v2 [hep-th] for this version)
  https://doi.org/10.48550/arXiv.1805.03518
Journal reference: Phys. Rev. D 98, 096016 (2018)
Related DOI: https://doi.org/10.1103/PhysRevD.98.096016

Submission history

From: Andrey Shkerin [view email]
[v1] Mon, 7 May 2018 12:29:01 UTC (521 KB)
[v2] Thu, 29 Nov 2018 11:33:20 UTC (2,659 KB)
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