Scattering Amplitude

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scattering amplitude

[′skad·ə·riŋ ‚am·plə‚tüd]
(quantum mechanics)
A quantity, depending in general on the energy and scattering angle, which specifies the wave function of particles scattered in a collision, and whose squared modulus is proportional to the number of particles scattered in a given direction.

Amplitude, Scattering


in the quantum theory of collisions, a quantity which numerically describes the collisions of microparticles. A beam of particles (with a determined impulse) which is falling on a target scatters, and the particles can deflect in any direction. The relative number of particles scattering at different angles to the primary direction of the beam depends on the particular law governing the interaction of the scattered particles with the target particles. The probability of a particle’s scattering at a given angle is determined by the scattering amplitude—or by the modulus square of the scattering amplitude, to be exact.


References in periodicals archive ?
With scattering amplitude calculations, we battle against (naive) combinatorial complexity as we go either higher in order of quantum correction ( loop order ), or higher in number of external particles scattering (multiplicity), so our advances must be revolutionary to lift us forward.
Finally, we propose a simple method based on the dependent scattering amplitude to assist paint formulators facing the task of improving the hiding power of a white paint either by increasing the quantity of pigments or by improving their spatial state of dispersion.
0] is the scattering amplitude between a helium atoms and neutrons; [mu] = m x [m.
Traditionally, the scattering amplitude of polarized neutrons with a polarized nucleus is described as follows:
Now, the general expression for the elastic scattering amplitude is (see [7], p.
In the case of PV neutron spin rotation, for example, the PV component of the forward scattering amplitude is proportional to the neutron momentum k, and, therefore, the relative phase [phi] = (n - 1)kz between the two neutron helicity states that leads to the rotation after a distance z, with n = 1 - 2[pi]f/[k.
We have calculated the differential cross-section with and without invoking the phase-variation parameter into the nucleon-nucleon (NN) scattering amplitude and compared our results with the corresponding experimental data.
The index of refraction of a medium in terms of the coherent forward scattering amplitude f(0) for a low-energy neutron [6] is
As an example, it is possible to construct the integrand of the complete, four-loop four-point scattering amplitude in maximally supersymmetric gauge theory in four dimensions using only planar data, and the solution of a linear system of Jacobi identities.
or -]] * p term) of the weak interaction forward scattering amplitude.
The neutron refractive index in terms of Sears' exact expression for the scattering amplitude has been analyzed in order to evaluate the measured phase shifts.
Freddy Cachazo, Perimeter Institute, for uncovering numerous structures underlying scattering amplitudes in gauge theories and gravity.