Zobrazeno 1 - 10
of 262
pro vyhledávání: '"Lam Hui"'
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 4, Pp 1-35 (2024)
Abstract We investigate the analytic structure of scattering amplitudes in theories in which Lorentz invariance is spontaneously broken. We do so by computing and studying the S-matrix for a simple example: a superfluid described by a complex scalar
Externí odkaz:
https://doaj.org/article/6123e10869ef43b694921d5e29828c5d
Publikováno v:
The Astrophysical Journal Letters, Vol 971, Iss 2, p L34 (2024)
Although stable neutron stars (NSs) can in principle exist down to masses M _ns ≈ 0.1 M _⊙ , standard models of stellar core-collapse predict a robust lower limit M _ns ≳ 1.2 M _⊙ , roughly commensurate with the Chandrasekhar mass M _Ch of th
Externí odkaz:
https://doaj.org/article/becd1313546e43428cc03cb2a129d67c
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 3, Pp 1-30 (2023)
Abstract Quasinormal modes describe the ringdown of compact objects deformed by small perturbations. In generic theories of gravity that extend General Relativity, the linearized dynamics of these perturbations is described by a system of coupled lin
Externí odkaz:
https://doaj.org/article/489f30606d104232b6380e8627d3cb69
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 2, Pp 1-49 (2023)
Abstract We derive soft theorems for theories in which time symmetries — symmetries that involve the transformation of time, an example of which are Lorentz boosts — are spontaneously broken. The soft theorems involve unequal-time correlation fun
Externí odkaz:
https://doaj.org/article/002781959e004ababedd78d9ad1a8494
Publikováno v:
Burns Open, Vol 6, Iss 4, Pp 187-191 (2022)
Hypergranulation, also known as overgranulation, occurs when there is more granulation tissue than required to fill the wound bed and the depth of the wound surface [1]. The presence of hypergranulation tissue in burn injury is rare, but it can imped
Externí odkaz:
https://doaj.org/article/3ebf3160de55465fbdd9ea73a6da3a92
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 9, Pp 1-13 (2022)
Abstract We study the near-zone symmetries of a massless scalar field on four-dimensional black hole backgrounds. We provide a geometric understanding that unifies various recently discovered symmetries as part of an SO(4, 2) group. Of these, a subse
Externí odkaz:
https://doaj.org/article/abaa64109fe24d67a821d58c16e0aa63
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 12, Pp 1-42 (2021)
Abstract We develop the effective theory for perturbations around black holes with scalar hair, in two directions. First, we show that the scalar-Gauss-Bonnet theory, often used as an example exhibiting scalar black hole hair, can be deformed by gali
Externí odkaz:
https://doaj.org/article/4ec27751a8f8485095acdd9d6801e0a7
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 2, Pp 1-54 (2019)
Abstract The final ringdown phase in a coalescence process is a valuable laboratory to test General Relativity and potentially constrain additional degrees of freedom in the gravitational sector. We introduce here an effective description for perturb
Externí odkaz:
https://doaj.org/article/7dbefa419e6f41ce85969af02ee6014d
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 1, Pp 1-17 (2019)
Abstract We reconsider the issue of whether scalar-tensor theories can admit stable wormhole configurations supported by a non-trivial radial profile for the scalar field. Using a recently proposed effective theory for perturbations around static, sp
Externí odkaz:
https://doaj.org/article/095ae180da8d467394949fb39462eecd
Publikováno v:
In Burns Open October 2022 6(4):187-191