Results 91 to 100 of about 217,791 (313)

Y-system for scattering amplitudes [PDF]

Journal of Physics A: Mathematical and Theoretical, 2010
We compute N=4 Super Yang Mills planar amplitudes at strong coupling by considering minimal surfaces in AdS_5 space. The surfaces end on a null polygonal contour at the boundary of AdS. We show how to compute the area of the surfaces as a function of the conformal cross ratios characterizing the polygon at the boundary.
Alday, L, Maldacena, J, Sever, A, Vieira, P   +3 more
openaire   +5 more sources

Flat-space scattering and bulk locality in the AdS/CFT correspondence

, 2000
The large radius limit in the AdS/CFT correspondence is expected to provide a holographic derivation of flat-space scattering amplitudes. This suggests that questions of locality in the bulk should be addressed in terms of properties of the S-matrix and ...
A. Martin, C. P. Burgess, D. Amati, D. J. Gross, D. J. Gross, D. W. Düsedau, D. Z. Freedman, E. Witten, F. Cerulus, J. Maldacena, L. Susskind, M. Abramowitz, M. Froissart, S. B. Giddings, S. S. Gubser, Steven B. Giddings, T. Inami, V. Balasubramanian, V. Balasubramanian, V. Balasubramanian, V. Ya. Fainberg   +20 more
core   +1 more source

X‐Ray Computed Tomography Quantifies Primary Phases and Reveals Crack Morphology in High‐Cycle Fatigue of Aluminum Alloy EN AW‐2618A

Advanced Engineering Materials, EarlyView.
Primary phases and a fatigue crack are studied in a forged blank of an aluminum alloy using synchrotron and laboratory X‐ray computed tomography. To image the crack, the fatigue test is interrupted, and a static tensile load is applied to open the crack.
Jakob Schröder, Ying Han, Tobias Fritsch, Bardia Hejazi, Alexander Ulbricht, Birgit Skrotzki, Giovanni Bruno   +6 more
wiley   +1 more source

Gravitational Regge bounds

SciPost Physics
We review the basic assumptions and spell out the detailed arguments that lead to the bound on the Regge growth of gravitational scattering amplitudes.
Kelian Häring, Alexander Zhiboedov
doaj   +1 more source

Scattering of conformal higher spin fields

Journal of High Energy Physics, 2018
We develop a formalism for describing the most general notion of tree-level scattering amplitudes in 4d conformal higher spin theory. As conformal higher spin fields obey higher-derivative equations of motion, there are many distinct on-shell external ...
Tim Adamo, Simon Nakach, Arkady A. Tseytlin   +2 more
doaj   +1 more source

Einstein-Yang-Mills Scattering Amplitudes From Scattering Equations

, 2014
We present the building blocks that can be combined to produce tree-level S-matrix elements of a variety of theories with various spins mixed in arbitrary dimensions.
Cachazo, Freddy, He, Song, Yuan, Ellis Ye   +2 more
core   +1 more source

Quality Enhancement of Laser Powder‐Bed Fusion Parts by Acoustically Assisted Additive Manufacturing by Laser Powder‐Bed Fusion and its Application to Lattice Structures

Advanced Engineering Materials, EarlyView.
Additive manufacturing technologies like laser powder‐bed fusion offer great design freedom and individualization of products down to a batch size of one. However, parts fabricated with this technology suffer from poor quality. Acoustic assistance during the build process can minimize these drawbacks.
Oliver Maurer, Dirk Bähre
wiley   +1 more source

The Grassmannian for celestial superamplitudes

Journal of High Energy Physics, 2021
Recently, scattering amplitudes in four-dimensional Minkowski spacetime have been interpreted as conformal correlation functions on the two-dimensional celestial sphere, the so-called celestial amplitudes.
Livia Ferro, Robert Moerman
doaj   +1 more source

Real‐Time Characterization of Polypropylene Jet Dynamics in Melt Electrospinning Using Laser Diffraction and Image Analysis

Advanced Engineering Materials, EarlyView.
This study uses real‐time laser diffraction image analysis to quantify fiber diameter changes and whipping behavior from the nozzle to the collector under varying electric field conditions. By capturing diffraction (scattering) intensity changes and bending angles, melt jet and whipping behavior are accurately assessed, supporting melt electrospinning ...
Jihwan Lim, Eunji Moon, Minseo Kim, Han Seong Kim   +3 more
wiley   +1 more source

Two-Loop Helicity Amplitudes for Quark-Gluon Scattering in QCD and Gluino-Gluon Scattering in Supersymmetric Yang-Mills Theory

, 2003
We present the two-loop QCD helicity amplitudes for quark-gluon scattering, and for quark-antiquark annihilation into two gluons. These amplitudes are relevant for next-to-next-to-leading order corrections to (polarized) jet production at hadron ...
A.D. Martin, A.V. Bogdan, Abilio De Freitas, C. Anastasiou, C. Anastasiou, C. Anastasiou, C. Anastasiou, C. Anastasiou, D. de Florian, D.A. Kosower, D.A. Kosower, E.A. Kuraev, E.W.N. Glover, E.W.N. Glover, F. Aversa, F.A. Berends, I. Jack, J. Soffer, J.A.M. Vermaseren, J.C. Collins, K.S. Kölbig, L. Dixon, L. Lewin, L.W. Garland, L.W. Garland, Lance Dixon, M.L. Mangano, M.T. Grisaru, P. Nogueira, R.K. Ellis, S. Alekhin, S. Catani, S. Catani, S. Moch, S. Moch, S. Weinzierl, S.D. Ellis, S.D. Ellis, S.J. Parke, T. Binoth, T. Gehrmann, V. Del Duca, V.A. Smirnov, W.L. van Neerven, W.T. Giele, W.T. Giele, W.T. Giele, Z. Bern, Z. Bern, Z. Bern, Z. Bern, Z. Bern, Z. Bern, Z. Bern, Z. Bern, Z. Bern, Z. Bern, Z. Bern, Z. Kunszt, Z. Xu, Zvi Bern   +60 more
core   +2 more sources