Synonymer & Information om | Engelska ordet FOUR-MOMENTUM

Exempel på hur du använder FOUR-MOMENTUM i en mening

• Systems whose four-momentum is a null vector (for example, a single photon or many photons moving in exactly the same direction) have zero invariant mass and are referred to as massless.
• In special relativity, four-momentum (also called momentum–energy or momenergy) is the generalization of the classical three-dimensional momentum to four-dimensional spacetime.
• The four-force is defined as the rate of change in the four-momentum of a particle with respect to the particle's proper time.
• In this particular diagram, the three arrowed straight lines represent particles, or particle propagators, and the wavy line a particle-particle interaction; removing (or amputating) the left-most and the right-most straight lines in the diagram shown below (these so-called external lines correspond to prescribed values for, for instance, momentum and energy, or four-momentum), one retains a contribution to the self-energy operator (in, for instance, the momentum-energy representation).
• The transverse mass is used together with the rapidity, transverse momentum and polar angle in the parameterization of the four-momentum of a single particle:.
• The four-momentum shows explicitly that the direction of propagation couples to the mSME coefficients, generating the periodic variations and compass asymmetries described in the previous section.
• From the covariant conservation laws for the spin tensor and energy–momentum tensor for a spinor field in the presence of torsion, it follows that if the wave satisfies the curved Dirac equation, then the four-velocity, four-momentum, and four-spin satisfy the Mathisson–Papapetrou equations of motion, which reduce to the geodesic equation.

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