Results 11 to 20 of about 222,838 (270)

Full one-loop amplitudes from tree amplitudes [PDF]

, 2008
We establish an efficient polynomial-complexity algorithm for one-loop calculations, based on generalized $D$-dimensional unitarity. It allows automated computations of both cut-constructible {\it and} rational parts of one-loop scattering amplitudes ...
, A. Cafarella, A. Pukhov ., C. Anastasiou, F. Krauss, G. 't Hooft, G. Ossola, G. Ossola, G. Passarino, J.R. Andersen, Kirill Melnikov, M.L. Mangano, R. Britto, R.K. Ellis, R.K. Ellis, R.K. Ellis, R.K. Ellis, T. Binoth, W.B. Kilgore, Walter T Giele, Z. Bern, Zoltan Kunszt   +21 more
core   +2 more sources

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, Amlan Chakraborty, Giulio Gambuti, Andreas von Manteuffel, Lorenzo Tancredi   +4 more
doaj   +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, Barbon, Chan, Chan, Chan, Chan, Chan, Chan, Chan, Chan, Chan, Chan, Chuan-Tsung Chan, Chung, Chung, Garousi, Green, Gross, Gross, Gross, Gross, Gross, Hashimoto, Hirano, Ho, Jen-Chi Lee, Kao, Klebanov, Kruczenski, Lee, Lee, Lee, Lee, Lee, Lee, Lee, Lee, Liu, Yi Yang   +38 more
core   +2 more sources

Soft radiation from scattering amplitudes revisited

Journal of High Energy Physics, 2021
We apply the recently developed formalism by Kosower, Maybee and O’Connell (KMOC) [12] to analyse the soft electromagnetic and soft gravitational radiation emitted by particles without spin in D ≥ 4 dimensions.
A. Manu, Debodirna Ghosh, Alok Laddha, P. V. Athira   +3 more
doaj   +1 more source

Tree-Level Formalism [PDF]

, 2011
We review two novel techniques used to calculate tree-level scattering amplitudes efficiently: MHV diagrams, and on-shell recursion relations. For the MHV diagrams, we consider applications to tree-level amplitudes and focus in particular on the N=4 ...
Adamo T Mason L, Andreas Brandhuber, Arkani-Hamed N, Arkani-Hamed N Bourjaily J L Cachazo F Caron-Huot S Trnka J, Arkani-Hamed N Cachazo F Kaplan J, Badger S D, Badger S D, Badger S D, Benincasa P, Benincasa P Conde E, Bern Z, Bern Z Carrasco J J M Johansson H, Bill Spence, Boels R, Boels R, Boels R, Boels R H, Brandhuber A, Brandhuber A, Brandhuber A, Britto R, Bullimore M Mason L Skinner D, Cachazo F, Cachazo F, Cachazo F, Cachazo F Svrcek P, Dixon L J, Dixon L J, Drummond J M, Eden R J, Elvang H, Elvang H, Elvang H, Ettle J H, Ettle J H, Feng B He S Huang R Jia Y, Feng H, Fu C H, Gabriele Travaglini, Gang D Huang Y T Koh E Lee S Lipstein A E, Georgiou G, Georgiou G, Gorsky A, Gukov S, Hodges A, Hodges A P, Hodges A P, Hodges A P, Mansfield P, Mason L J, Mason L Skinner D, Ozeren K J, Quigley C, Risager K, Roiban R, Thorn C B   +55 more
core   +1 more source

Amplitudes, observables, and classical scattering

Journal of High Energy Physics, 2019
We present a formalism for computing classically measurable quantities directly from on-shell quantum scattering amplitudes. We discuss the ingredients needed for obtaining the classical result, and show how to set up the calculation to derive the result
David A. Kosower, Ben Maybee, Donal O’Connell   +2 more
doaj   +1 more source

Unifying relations for scattering amplitudes

Journal of High Energy Physics, 2018
We derive new amplitudes relations revealing a hidden unity among a wideranging variety of theories in arbitrary spacetime dimensions. Our results rely on a set of Lorentz invariant differential operators which transmute physical tree-level scattering ...
Clifford Cheung, Chia-Hsien Shen, Congkao Wen   +2 more
doaj   +1 more source

Scattering amplitudes of fermions on monopoles

Journal of High Energy Physics, 2023
We consider scattering processes involving massless fermions and ’t Hooft-Polyakov magnetic monopoles in a minimal SU(2) model and in the Grand Unified SU(5) theory.
Valentin V. Khoze
doaj   +1 more source

Plahte diagrams for string scattering amplitudes

Journal of High Energy Physics, 2021
Plahte identities are monodromy relations between open string scattering amplitudes at tree level derived from the Koba-Nielsen formula. We represent these identities by polygons in the complex plane.
Pongwit Srisangyingcharoen, Paul Mansfield   +1 more
doaj   +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
doaj   +1 more source