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- W4382988572 abstract "Abstract The Effective Field Theory (EFT) of perturbations on an arbitrary background geometry with a timelike scalar profile has been recently constructed in the context of scalar-tensor theories. Unlike General Relativity, the regular Hayward metric is realized as an exact background metric in the Effective Field Theory with timelike scalar profile without resorting to special matter field, such as nonlinear electrodynamics. The fundamental quasinormal mode for axial graviational perturbations of this black hole has been considered recently with the help of various methods. Here we make a further step in this direction and find that, unlike the fundamental mode, a few first overtones deviate from their Schwarzschild limit at a much higher rate. This outburst of overtones occurs because the overtones are extremely sensitive to the least change of the near- horizon geometry. The analytical formula for quasinormal modes is obtained in the eikonal regime. In addition, we calculated grey-body factors and showed that the regular Hayward black hole with a scalar hair has a smaller grey-body factor than the Schwarzschild one. Integration of the wave-like equation in the time-domain shows that the power-law tails, following the ring-down phase, are indistinguishable from the Schwarzschild ones at late times." @default.
- W4382988572 created "2023-07-04" @default.
- W4382988572 creator A5034397464 @default.
- W4382988572 date "2023-07-01" @default.
- W4382988572 modified "2023-10-18" @default.
- W4382988572 title "Quasinormal modes and grey-body factors of regular black holes with a scalar hair from the Effective Field Theory" @default.
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- W4382988572 doi "https://doi.org/10.1088/1475-7516/2023/07/001" @default.
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