Zobrazeno 1 - 10
of 627
pro vyhledávání: '"Di Vecchia, A."'
Using universal predictions provided by classical soft theorems, we revisit the energy emission spectrum for gravitational scatterings of compact objects in the low-frequency expansion. We calculate this observable beyond the zero-frequency limit, re
Externí odkaz:
http://arxiv.org/abs/2407.04128
Autor:
Alessio, Francesco, Di Vecchia, Paolo
We introduce a classical version of the loop corrected soft graviton theorem and we use it to compute the universal part of the one-loop (2PM) waveform up to sub-subleading order in the energy $\omega$ of the emitted graviton for spinless black-hole
Externí odkaz:
http://arxiv.org/abs/2402.06533
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 11, Pp 1-46 (2024)
Abstract Using universal predictions provided by classical soft theorems, we revisit the energy emission spectrum for gravitational scatterings of compact objects in the low-frequency expansion. We calculate this observable beyond the zero-frequency
Externí odkaz:
https://doaj.org/article/3138e53ff0ae4803a7b39915a20aeaab
Motivated by conceptual problems in quantum theories of gravity, the gravitational eikonal approach, inspired by its electromagnetic predecessor, has been successfully applied to the transplanckian energy collisions of elementary particles and string
Externí odkaz:
http://arxiv.org/abs/2306.16488
We propose two possible eikonal operators encoding the effects of classical radiation as coherent states of gravitons and show how to compute from them different classical observables. In the first proposal, only genuinely propagating gravitons are i
Externí odkaz:
http://arxiv.org/abs/2210.12118
Observables related to the real part of the gravitational eikonal, such as the deflection angle and time delay, have been found so far to have a smooth post-Minkowskian (PM) expansion whose validity extends from the non-relativistic to the most extre
Externí odkaz:
http://arxiv.org/abs/2204.02378
Autor:
Alessio, Francesco, Di Vecchia, Paolo
Starting from the leading soft term of the 5-point amplitude, involving a graviton and two Kerr black holes, that factorises into the product of the elastic amplitude without the graviton and the leading soft factor, we compute the infrared divergent
Externí odkaz:
http://arxiv.org/abs/2203.13272
By following closely Weinberg's soft theorem, which captures the $1/\omega$ pole contribution to the amplitude for soft graviton emissions ($\omega<\Lambda$) on top of an arbitrary background hard process, we calculate the expectation value of the gr
Externí odkaz:
http://arxiv.org/abs/2203.11915
Publikováno v:
In Physics Reports 12 September 2024 1083:1-169
Using $\mathcal N=8$ supergravity as a theoretical laboratory, we extract the 3PM gravitational eikonal for two colliding massive scalars from the classical limit of the corresponding elastic two-loop amplitude. We employ the eikonal phase to obtain
Externí odkaz:
http://arxiv.org/abs/2104.03256