Zobrazeno 1 - 10
of 294
pro vyhledávání: '"Gabriele Veneziano"'
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 7, Pp 1-26 (2024)
Abstract Gauge invariance of QCD dictates the presence of string junctions in the wave functions of baryons. In high-energy inclusive processes, these baryon junctions have been predicted to induce the separation of the flows of baryon number and fla
Externí odkaz:
https://doaj.org/article/e2bbdcb342ae48b0acbbdfb822a2c67b
Publikováno v:
Physics Letters B, Vol 843, Iss , Pp 138049- (2023)
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:
https://doaj.org/article/1e71313cd3d24406a2e63d0bffe1405e
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 7, Pp 1-31 (2022)
Abstract 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 m
Externí odkaz:
https://doaj.org/article/6e2ec01229724b25867a0c9751082255
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 4, Pp 1-74 (2022)
Abstract For spacetimes containing quiescent singularity hypersurfaces we propose a general notion of junction conditions based on a prescribed singularity scattering map, as we call it, and we introduce the notion of a cyclic spacetime (also called
Externí odkaz:
https://doaj.org/article/3e5a991d675544789546ac52a1141954
Angular momentum loss in gravitational scattering, radiation reaction, and the Bondi gauge ambiguity
Publikováno v:
Physics Letters B, Vol 834, Iss , Pp 137419- (2022)
Recently, Damour computed the radiation reaction on gravitational scattering as the (linear) response to the angular momentum loss which he found to be of O(G2) in the gravitational constant. This is a puzzle because any amplitude calculation would p
Externí odkaz:
https://doaj.org/article/44d005509514468b85e78919daac5f0b
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 7, Pp 1-80 (2021)
Abstract Using N $$ \mathcal{N} $$ = 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 eikona
Externí odkaz:
https://doaj.org/article/17a68a981bbc43e5bb4e60173e42e521
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 3, Pp 1-35 (2020)
Abstract High-energy massless gravitational scattering in N $$ \mathcal{N} $$ = 8 supergravity was recently analyzed at leading level in the deflection angle, uncovering an interesting connection between exponentiation of infrared divergences in mome
Externí odkaz:
https://doaj.org/article/870efede13e7431aa5661d984eed706f
Publikováno v:
Physics Letters B, Vol 818, Iss , Pp 136379- (2021)
Radiation reaction (RR) terms at the third post-Minkowskian (3PM) order have recently been found to be instrumental in restoring smooth continuity between the non-relativistic, relativistic, and ultra-relativistic (including the massless) regimes. He
Externí odkaz:
https://doaj.org/article/ec14de1f22a64032965e5b7723cebb44
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 5, Pp 1-39 (2019)
Abstract Using soft-graviton theorems a well-known zero-frequency limit (ZFL) for the gravitational radiation flux dE GW /dω is re-derived and extended to order O ω $$ \mathcal{O}\left(\omega \right) $$ and O ω 2 $$ \mathcal{O}\left({\omega}^2\rig
Externí odkaz:
https://doaj.org/article/583d21233cda4dedbc4f41dd3439ff86
Publikováno v:
Physics Letters B, Vol 811, Iss , Pp 135924- (2020)
We discuss the ultra-relativistic gravitational scattering of two massive particles at two-loop (3PM) level. We find that in this limit the real part of the eikonal, determining the deflection angle, is universal for gravitational theories in the two
Externí odkaz:
https://doaj.org/article/4930129536c14f4d9cdcabb483af97c0