Results 21 to 30 of about 2,054,858 (263)
All Order Gravitational Waveforms from Scattering Amplitudes. [PDF]
Physical Review Letters, 2022 Waveforms are classical observables associated with any radiative physical process. Using scattering amplitudes, these are usually computed in a weak-field regime to some finite order in the post-Newtonian or post-Minkowskian approximation.
T. Adamo +3 more
semanticscholar +1 more source
Where Is String Theory in the Space of Scattering Amplitudes? [PDF]
Physical Review Letters, 2021 We use the S-matrix bootstrap to carve out the space of unitary, crossing symmetric and supersymmetric graviton scattering amplitudes in ten dimensions.
A. Guerrieri, J. Penedones, P. Vieira
semanticscholar +1 more source
Natural boundaries for scattering amplitudes
SciPost Physics, 2023 Singularities, such as poles and branch points, play a crucial role in investigating the analytic properties of scattering amplitudes that inform new computational techniques.
Sebastian Mizera
doaj +1 more source
Pentagon functions for one-mass planar scattering amplitudes [PDF]
Journal of High Energy Physics, 2021 We present analytic results for all planar two-loop Feynman integrals contributing to five-particle scattering amplitudes with one external massive leg.
D. Chicherin, V. Sotnikov, S. Zoia
semanticscholar +1 more source
Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022 Abstract Positron emission tomography with x‐ray computed tomography (PET/CT) is increasingly being utilized for radiation treatment planning (RTP). Accurate delivery of RT therefore depends on quality PET/CT data. This study covers quality control (QC) procedures required for PET/CT for diagnostic imaging and incremental QC required for RTP.
Ran Klein +7 more
wiley +1 more source
International Journal of Adaptive Control and Signal Processing, EarlyView., 2023 Summary In this contribution, we propose a detailed study of interpolation‐based data‐driven methods that are of relevance in the model reduction and also in the systems and control communities. The data are given by samples of the transfer function of the underlying (unknown) model, that is, we analyze frequency‐response data.
Quirin Aumann, Ion Victor Gosea
wiley +1 more source
Quadratic-in-spin Hamiltonian at $$ \mathcal{O} $$(G2) from scattering amplitudes [PDF]
Journal of High Energy Physics, 2021 We obtain the quadratic-in-spin terms of the conservative Hamiltonian describing the interactions of a binary of spinning bodies in General Relativity through $$ \mathcal{O} $$ O (G2) and to all orders in velocity.
Dimitrios I. Kosmopoulos, A. Luna
semanticscholar +1 more source
Advanced Engineering Materials, EarlyView., 2023 The study presents the mechanical and in situ sensing performance of digital light processing‐enabled 2D lattice nanocomposites under monotonic tensile and repeated cyclic loading, and provides guidelines for the design of architectures suitable for strain sensors and smart lightweight structures.
Omar Waqas Saadi +3 more
wiley +1 more source
Scattering amplitudes and conservative dynamics at the fourth post-Minkowskian order
Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2022), 2022 We review recent progress using amplitudes methods to obtain new results for the conservative classical scattering of two massive black holes at order O( 𝐺 4 ) .
M. Ruf +6 more
semanticscholar +1 more source
Subsubleading soft graviton symmetry and MHV graviton scattering amplitudes [PDF]
Journal of High Energy Physics, 2021 In [8] it was shown that supertranslation and SL2ℂ¯\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}
Shamik Banerjee +2 more
semanticscholar +1 more source