Quantum decay of scalar and vector boson stars and oscillons into gravitons

Nakayama, Kazunori; Takahashi, Fuminobu; Yamada, Masaki

doi:10.1088/1475-7516/2023/08/058

Cited by 3 publications

(1 citation statement)

References 164 publications

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“…The urgent need for such corrections in the case of models of nuclei has recently been highlighted in refs. [27][28][29]. Recently, there has even been progress in understanding quantum corrections to Q-balls [30].…”

Section: Jhep05(2024)098mentioning

confidence: 99%

A (2+1)-dimensional domain wall at one-loop

Ogundipe,

Evslin,

Zhang

et al. 2024

J. High Energ. Phys.

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We consider the domain wall in the (2+1)-dimensional ϕ4 double well model, created by extending the ϕ4 kink in an additional infinite direction. Classically, the tension is m3/3λ where λ is the coupling and m is the meson mass. At order O(λ0) all ultraviolet divergences can be removed by normal ordering, less trivial divergences arrive only at the next order. This allows us to easily quantize the domain wall, working at order O(λ0). We calculate the leading quantum correction to its tension as a two-dimensional integral over a function which is determined analytically. This integral is performed numerically, resulting in −0.0866m2. This correction has previously been computed twice in the literature, and the results of these two computations disagreed. Our result agrees with and so confirms that of Jaimunga, Semenoff and Zarembo. We also find, at this order, the excitation spectrum and a general expression for the one-loop tensions of domain walls in other scalar models.

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Section: Jhep05(2024)098mentioning

confidence: 99%

A (2+1)-dimensional domain wall at one-loop

Ogundipe,

Evslin,

Zhang

et al. 2024

J. High Energ. Phys.

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The energy-frequency diagram of the (1+1)-dimensional Φ4 oscillon

Alexeeva,

Barashenkov,

Dika

et al. 2024

J. High Energ. Phys.

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Two different methods are used to study the existence and stability of the (1+1)-dimensional Φ4 oscillon. The variational technique approximates it by a periodic function with a set of adiabatically changing parameters. An alternative approach treats oscillons as standing waves in a finite-size box; these are sought as solutions of a boundary-value problem on a two-dimensional domain. The numerical analysis reveals that the standing wave’s energy-frequency diagram is fragmented into disjoint segments with ωn+1< ω < ωn, where ωn = ω0/(n + 1), n = 0, 1, 2, . . ., and ω0 is the endpoint of the continuous spectrum (mass threshold of the model). The variational approximation involving the first, zeroth and second harmonic components provides an accurate description of the oscillon with the frequency in (ω1, ω0), but breaks down as ω falls out of that interval.

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