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 ?
94 there is a binary peak from the CH (C- 1) group of Pyridine ring that has a coupling constant equal to 8.
The dimensionless parameter determining the relative strength of any interaction (an interaction constant or coupling constant a) is assumed proportional to the source interaction charge by analogy with the charge of an electron in the electromagnetic interaction:
The coupling constant values also supported the above proposed structure.
By coupling constant volume combustion of slow-burning diesel fuel with Atkinson over-expansion, skip-cycle firing, and engine heat harvesting, HEHC engines can achieve levels of thermodynamic efficiency that are simply impossible for piston engines, including the latest generation Opposed Piston Opposed Cylinder (OPOC) designs.
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.
Why, for example, does the strong force coupling constant have just the value it does?
While strong supporting evidence for the particle physics theory of Quantum Chromodynamics (QCD) has been found in high energy collisions in experimental tests using perturbativetreatments because of its asymptotic freedom behavior, the perturbative procedures have proven problematic for low-energy QCD, since the running coupling constant goes beyond 1.
Compared to 2, one olefinic proton having a large coupling constant (~16.