Results 11 to 20 of about 4,823,752 (344)
Physical Review D, 2004 We elucidate the one-loop twistor-space structure corresponding to momentum-space maximally helicity-violating diagrams. We also discuss the infrared divergences, and argue that only a limited set of maximally helicity-violating diagrams contain them. We
I. Bena, Z. Bern, D. Kosower, R. Roiban
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Conformal higher spin scattering amplitudes from twistor space [PDF]
Journal of High Energy Physics, 2017 We use the formulation of conformal higher spin (CHS) theories in twistor space to study their tree-level scattering amplitudes, finding expressions for all three-point M H V ¯ $$ \overline{\mathrm{MHV}} $$ amplitudes and all MHV amplitudes involving ...
Tim Adamo +2 more
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Twistor space, Minkowski space and the conformal group [PDF]
Physica A: Statistical Mechanics and its Applications, 1983 Although twistors describe the geometry of Minkowski space, the symmetry of compactified Minkowski space is not that of twistor space, but the latter is four-one homomorphic to the part of the former which is connected to the identity. To clarify this puzzle it is shown here that a better definition of a symmetry group for twistors is the group of ...
Broek, P.M. van den
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Gauge Theory Amplitudes In Twistor Space And Holomorphic Anomaly [PDF]
, 2004 We show that, in analyzing differential equations obeyed by one-loop gauge theory amplitudes, one must take into account a certain holomorphic anomaly. When this is done, the results are consistent with the simplest twistor-space picture of the available
Freddy Cachazo +2 more
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Correspondence spaces and twistor spaces for parabolic geometries [PDF]
Journal für die reine und angewandte Mathematik (Crelles Journal), 2005 For a semisimple Lie group $G$ with parabolic subgroups $Q\subset P\subset G$, we associate to a parabolic geometry of type $(G,P)$ on a smooth manifold $N$ the correspondence space $\Cal CN$, which is the total space of a fiber bundle over $N$ with fiber a generalized flag manifold, and construct a canonical parabolic geometry of type $(G,Q)$ on $\Cal
Andreas Čap
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Inherited twistor-space structure of gravity amplitudes [PDF]
, 2005 At tree-level, gravity amplitudes are obtainable directly from gauge theory amplitudes via the Kawai, Lewellen and Tye closed-open string relations.
Zvi Bern +2 more
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Double-copying self-dual Yang-Mills theory to self-dual gravity on twistor space [PDF]
Journal of High Energy Physics, 2023 We construct a simple Lorentz-invariant action for maximally supersymmetric self-dual Yang-Mills theory that manifests colour-kinematics duality. We also show that this action double-copies to a known action for maximally supersymmetric self-dual gravity.
Leron Borsten +5 more
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Invariant distributions and the transport twistor space of closed surfaces [PDF]
Journal of the London Mathematical Society, 2023 We study transport equations on the unit tangent bundle of a closed oriented Riemannian surface and their links to the transport twistor space of the surface (a complex surface naturally tailored to the geodesic vector field).
Jan Bohr +2 more
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Celestial w1+∞ Symmetries from Twistor Space [PDF]
Symmetry, Integrability and Geometry: Methods and Applications, 2021 . We explain how twistor theory represents the self-dual sector of four dimensional gravity in terms of the loop group of Poisson diffeomorphisms of the plane via Penrose’s nonlinear graviton construction.
T. Adamo, L. Mason, A. Sharma
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The 4d/2d correspondence in twistor space and holomorphic Wilson lines [PDF]
Journal of High Energy Physics, 2022 We give an explicit realization of the 4d local operator / 2d conformal block correspondence of Costello and Paquette in the case of gauge theories. This is accomplished by lifting the 4d local operators to non-local operators in twistor space using a ...
Wei Bu, Eduardo Casali
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