coupling constant


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coupling constant

[′kəp·liŋ ′kän·stənt]
(particle physics)
A measure of the strength of a type of interaction between particles, such as the strong interaction between mesons and nucleons, and the weak interaction between four fermions; analogous to the electric charge, which is the coupling constant between charged particles and electromagnetic radiation.
(physics)
A measure of the strength of the coupling between two systems, especially electric circuits; maximum coupling is 1 and no coupling is 0. Also known as coefficient of coupling; coupling coefficient.
A measure of the dependence of one physical quantity on another.
References in periodicals archive ?
The chemical shift values are reported in ppm (I') units and coupling constant (J) are shown in Hz.
The apparent lack of a generic tunable parameter that allows to solve the theory perturbatively (like the electric coupling constant in electrodynamics, or the rank of the gauge group in large-N Yang-Mills theory) is arguably the single most important obstacle for generic efficient approaches to the physics of strong gravity and black holes.
where b is a positive coupling constant, [rho] = [[rho].
So the behavior of the length a is like the behavior of the coupling constant [[alpha].
94 there is a binary peak from the CH (C- 1) group of Pyridine ring that has a coupling constant equal to 8.
Again, the small coupling constant between H-3 and H-2 protons requires cis axial-equatorial relationship.
The coupling constant values also supported the above proposed structure.
The analytic expressions that describe the relations between the resonant mode frequencies and coupling constant have been derived.
Electron(s) as photon(s) of mass continue outwardly to interact with real photons at the base of the quantum cone which is the amplitude of the e coupling constant.
Through an analysis of nuclear forces, they indicate that only a small change in the strength of the coupling constant that characterizes the so-called strong force between nucleons would lead to a change in decay constants of many orders of magnitude.
Neutron [beta]-decay provides the most precise measurements of the relative axial-vector coupling constant [lambda].
Some representative topics include the NMR spin-spin coupling of HOD, co rrelation of the proton chemical shift and carbon-13 coupling constant of tert-butyl groups, hazard assessment of rotary evaporation, and the recovery of acetonitrile and other solvents.