Results 71 to 80 of about 2,118,889 (347)
Three-loop helicity amplitudes for four-quark scattering in massless QCD
Journal of High Energy Physics, 2021 We compute the three-loop corrections to the helicity amplitudes for q q ¯ $$ \overline{q} $$ → Q Q ¯ $$ \overline{Q} $$ scattering in massless QCD. In the Lorentz decomposition of the scattering amplitude we avoid evanescent Lorentz structures and map ...
Fabrizio Caola +4 more
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On the Cuts of Scattering Amplitudes [PDF]
Nuclear Physics B - Proceedings Supplements, 2008 The use of complex analysis for computing one-loop scattering amplitudes is naturally induced by generalised unitarity-cut conditions, fulfilled by complex values of the loop variable. We report on two techniques: the cut-integration with spinor-variables as contour integrals of rational functions; and the use of the Discrete Fourier Transform to ...
openaire +4 more sources
Tensor decomposition for bosonic and fermionic scattering amplitudes [PDF]
Physical Review D, 2020 In this paper, we elaborate on a method to decompose multiloop multileg scattering amplitudes into Lorentz-invariant form factors, which exploits the simplifications that arise from considering four-dimensional external states.
T. Peraro, L. Tancredi
semanticscholar +1 more source
Scatterings of Massive String States from D-brane and Their Linear Relations at High Energies [PDF]
, 2006 We study scatterings of bosonic massive closed string states at arbitrary mass levels from D-brane. We discover that all the scattering amplitudes can be expressed in terms of the generalized hypergeometric function with special arguments, which ...
Bachas +38 more
core +2 more sources
Tropical fans, scattering equations and amplitudes
Journal of High Energy Physics, 2021 We describe a family of tropical fans related to Grassmannian cluster algebras. These fans are related to the kinematic space of massless scattering processes in a number of ways.
James Drummond +3 more
doaj +1 more source
Using neural networks for efficient evaluation of high multiplicity scattering amplitudes [PDF]
Journal of High Energy Physics, 2020 Precision theoretical predictions for high multiplicity scattering rely on the evaluation of increasingly complicated scattering amplitudes which come with an extremely high CPU cost. For state-of-the-art processes this can cause technical bottlenecks in
S. Badger, Joseph Aylett-Bullock
semanticscholar +1 more source
ABJM flux-tube and scattering amplitudes
Journal of High Energy Physics, 2019 There is a number of indications that scattering amplitudes in the Aharony-Bergman-Jafferis-Maldacena theory might have a dual description in terms of a holonomy of a supergauge connection on a null polygonal contour in a way analogous to the four ...
Benjamin Basso, Andrei V. Belitsky
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Syzygies probing scattering amplitudes [PDF]
Journal of High Energy Physics, 2016 33 pages, 10 ...
Yehao Zhou +5 more
openaire +4 more sources
Scattering Amplitudes and the Conservative Hamiltonian for Binary Systems at Third Post-Minkowskian Order. [PDF]
Physical Review Letters, 2019 We present the amplitude for classical scattering of gravitationally interacting massive scalars at third post-Minkowskian order. Our approach harnesses powerful tools from the modern amplitudes program such as generalized unitarity and the double-copy ...
Z. Bern +5 more
semanticscholar +1 more source
Universal opening of four-loop scattering amplitudes to trees [PDF]
Journal of High Energy Physics, 2020 The perturbative approach to quantum field theories has made it possible to obtain incredibly accurate theoretical predictions in high-energy physics.
S. Ramírez-Uribe +4 more
semanticscholar +1 more source