Results 1 to 10 of about 2,132,739 (345)

Δ-algebra and scattering amplitudes [PDF]

Journal of High Energy Physics, 2019
In this paper we study an algebra that naturally combines two familiar operations in scattering amplitudes: computations of volumes of polytopes using triangulations and constructions of canonical forms from products of smaller ones.
Freddy Cachazo, Nick Early, Alfredo Guevara, Sebastian Mizera   +3 more
doaj   +5 more sources

Learning scattering amplitudes by heart [PDF]

Physics Letters B, 2021
The canonical forms associated to scattering amplitudes of planar Feynman diagrams are interpreted in terms of masses of projectives, defined as the modulus of their central charges, in the hearts of certain t-structures of derived categories of quiver ...
Severin Barmeier, Koushik Ray
doaj   +4 more sources

Unifying relations for scattering amplitudes [PDF]

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   +7 more sources

Amplitudes, observables, and classical scattering [PDF]

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
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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   +3 more sources

String scattering amplitudes and deformed cubic string field theory

Physics Letters B, 2018
We study string scattering amplitudes by using the deformed cubic string field theory which is equivalent to the string field theory in the proper-time gauge.
Sheng-Hong Lai, Jen-Chi Lee, Taejin Lee, Yi Yang   +3 more
doaj   +4 more sources

Scattering amplitudes and electromagnetic horizons

Journal of High Energy Physics, 2023
We consider the scattering of charged particles on particular electromagnetic fields which have properties analogous to gravitational horizons. Classically, particles become causally excluded from regions of spacetime beyond a null surface which we ...
Anton Ilderton, William Lindved
doaj   +3 more sources

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
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Massive scattering amplitudes in six dimensions

Journal of High Energy Physics, 2019
We show that a natural spinor-helicity formalism that can describe massive scattering amplitudes exists in D = 6 dimensions. This is arranged by having helicity spinors carry an index in the Dirac spinor 4 of the massive little group, SO(5) ∼ Sp(4).
Rishabh Jha, Chethan Krishnan, K. V. Pavan Kumar   +2 more
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Crossing beyond scattering amplitudes

Journal of High Energy Physics
We find that different asymptotic measurements in quantum field theory can be related to one another through new versions of crossing symmetry. Assuming analyticity, we conjecture generalized crossing relations for multi-particle processes and the ...
Simon Caron-Huot, Mathieu Giroux, Holmfridur S. Hannesdottir, Sebastian Mizera   +3 more
doaj   +3 more sources