coupling constant

(redirected from coupling constants)

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 ?
One-bond coupling constants ([.sup.1][J.sub.CH]) are ~145 Hz, and the two ([.sup.2][J.sub.CH]) and three ([.sup.3][J.sub.CH]) bond couplings are in the range of ~5-l5Hz (See Figure 1).
The relative configurations of 1 were deduced by the [sup.1]H-[sup.1]H coupling constants and ROESY data (Figure S6).
10, 1.04, 0.96, 0.90, 0.88 and 0.83 while two methyls were observed as doublet at I' 0.94 and 0.81 with coupling constants between 6.6-6.8 Hz.
The chemical shifts and coupling constants of 1 were in good agreement with those of (3S,4S,5R,6S,9S,7E)-megastigman-7ene-5,6-epoxy-3,4,9-triol 9-O-[beta]-D-glucopyranoside recorded in the same deuterated solvent [24] but quite different from the data of the C-4.
Chemical shifts are quoted in parts per million from Si[Me.sub.4] or residual solvent proton signals and coupling constants (J) given in Hertz.
Considerable attention has been focused on the strong form factors and coupling constants of meson vertices in the context of quantum chromodynamics (QCD) since the last decade.
where [[phi].sub.B] is a bare real scalar field and [t.sub.0] and [[alpha].sub.0n] are bare coupling constants. The second term indicates the potential energy of the scalar field [phi].
We found firstly that the elementary particles mass obey a simple equation, which is geometrical and based on integral resonances; secondly, two coupling constants (including [alpha]) are used in the equation while we find no specific couplings related to the SM weak and Higgs fields as they use only specific geometrical degrees of freedom; thirdly, all calculi and equations are compatible with a simple form of compositeness.
Following an article by James Cronin, in which he discusses his career in experimental particle physics, physicists from the US, Mexico, Japan, and Europe discuss the following: the polarizabilities of light hadrons, the effective field theory approach to physics beyond the Standard Model using dimension-six operators, the kilometer-scale neutrino detector IceCube, fluid dynamics and viscosity in strongly correlated fluids, the coupling constants of chiral Lagrangians in the meson sector, or low-energy constants, and superconducting radio-frequency cavities.
Among the topics are the physical basis of the NMR experiment, proton chemical shifts and spin-spin coupling constants as functions of structure, the influence of molecular symmetry and chirality on proton magnetic resonance spectra, carbon-13 NMR spectroscopy, selected heteronuclei, and NMR of partially oriented molecules and solid-state NMR.
The large coupling constants ([J.sub.4,3] = [J.sub.4,5] = 9.6 Hz) for the H-4 axial proton requires transdiaxial relationship with H-3 and H-5 protons.
The magnetic moment of electrons, dynamically generated mass of photons, and QED coupling constants are estimated as functions of temperature.