Zobrazeno 1 - 10
of 3 779
pro vyhledávání: '"A. Kehagias"'
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 5, Pp 1-69 (2024)
Abstract An extended search for anomaly free matter coupled N = (1, 0) supergravity in six dimension is carried out by two different methods which we refer to as the graphical and rank methods. In the graphical method the anomaly free models are buil
Externí odkaz:
https://doaj.org/article/e577a91115f84786a481faaf15d83ca1
Publikováno v:
Nuclear Physics B, Vol 999, Iss , Pp 116432- (2024)
Due to the nature of gravity, non-linear effects are left imprinted in the quasi-normal modes generated in the ringdown phase of the merger of two black holes. We offer an analytical treatment of the quasi-normal modes at second-order in black hole p
Externí odkaz:
https://doaj.org/article/88479f6d20ce41f18c109541e8abc65f
The spectrum of the quasinormal modes of the gravitational waves emitted during the ringdown phase following the merger of two black holes is of primary importance in gravitational astronomy. However, the spectrum is extremely sensitive to small dist
Externí odkaz:
http://arxiv.org/abs/2407.20144
We provide a simple proof of why the Love number vanishes for extremal Reissner-Nordstrom and Kerr-Newman black holes. The argument is based on a conformal inversion isometry of the spacetime connecting the horizon with large distances.
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Externí odkaz:
http://arxiv.org/abs/2406.19262
We study the following game. Three players start with initial capitals of $s_{1},s_{2},s_{3}$ dollars; in each round player $P_{m}$ is selected with probability $\frac{1}{3}$; then \emph{he} selects player $P_{n}$ and they play a game in which $P_{m}
Externí odkaz:
http://arxiv.org/abs/2406.07878
We show why the threshold for primordial black hole formation is universal (independent from the shape of the perturbation) when expressed in terms of the volume averaged compaction function. The proof is rooted in the self-similarity of the gravitat
Externí odkaz:
http://arxiv.org/abs/2405.05208
We revisit the genuine Fayet-Iliopoulos terms of 4D N=1 supergravity. Such terms are commonly believed to preserve a global symmetry, and therefore they are in conflict with the principles of quantum gravity. However, we find that generically there d
Externí odkaz:
http://arxiv.org/abs/2404.12799
We provide evidence for a correspondence between the formation of black holes and the stability of circular null geodesics around the collapsing perturbation. We first show that the critical threshold of the compaction function to form a black hole i
Externí odkaz:
http://arxiv.org/abs/2404.02801
We study the physics of photon rings in a wide range of axisymmetric black holes admitting a separable Hamilton-Jacobi equation for the geodesics. Utilizing the Killing-Yano tensor, we derive the Penrose limit of the black holes, which describes the
Externí odkaz:
http://arxiv.org/abs/2403.10605
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 10, Pp 1-19 (2019)
Abstract We propose a mechanism to solve the Higgs naturalness problem through a cosmological selection process. The discharging of excited field configurations through membrane nucleation leads to discrete jumps of the cosmological constant and the
Externí odkaz:
https://doaj.org/article/259151179ad842d5ba04687f50189d5c