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conjecture regarding high energy symmetry of string theory was based on the saddle-point calculation of hard string scattering amplitudes (SSA) of both the...

field theories the amplitudes grow too fast at high energies to make a unitary S-matrix. But without extra assumptions on the high-energy behavior, unitarity...

representation to multiparticle scattering. Veneziano and Sergio Fubini introduced an operator formalism for computing the scattering amplitudes that was a forerunner...

strings, as well as string propagators, that give a Feynman diagram-like expansion for string scattering amplitudes. In most string field theories, this...

amplitudes calculated via twistor string theory. Despite its shortcomings, twistor string theory led to rapid developments in the study of scattering...

theoretical particle physics, maximally helicity violating amplitudes (MHV) are amplitudes with n {\displaystyle n} massless external gauge bosons, where...

of the integrand for scattering amplitudes. Arkani-Hamed suggests this is why amplituhedron theory simplifies scattering-amplitude calculations: in the...

near-beam line scattering and scattering at very large energies. Modern research focuses both on the connection to perturbation theory and to string theory....

function, including p {\displaystyle p} vertex operators, describes the scattering amplitude of strings. The symmetry group of the action actually reduces drastically...

appearing in a scattering process rather than particle, as it is considered not to exist long enough to be measured independently of the scattering process....

a travelling wave, since the ratio of amplitudes is equal to 1. A pure standing wave does not transfer energy from the source to the destination. However...

known for collaborating with Ruth Britto on a method calculating scattering amplitudes known as the BCFW recursion relations. Witten has been honored with...

level scattering amplitude is the volume of the dual associahedron. The associahedron also helps explaining the relations between scattering amplitudes of...

theoretical physicist of Iranian descent, with interests in high-energy physics, quantum field theory, string theory, cosmology and collider physics. Arkani-Hamed...

the scattering amplitude as a function of the cosine of the scattering angle as the power law for the falloff of scattering amplitudes at high energy. Along...

page is a glossary of terms in string theory, including related areas such as supergravity, supersymmetry, and high energy physics. Contents:  Conventions...

they include Crossing: The amplitudes for antiparticle scattering are the analytic continuation of particle scattering amplitudes. Dispersion relations: the...

mass/energy interact only when they cross. It is implausible that the outgoing state would be completely determined by some tiny residual scattering.[citation...

probability amplitudes are straightforwardly given. An example is Compton scattering, with an electron and a photon undergoing elastic scattering. Feynman...

calculate the amplitudes for collisions which emit low energy pions from the amplitude for the same process with no pions. The amplitudes are those given...