relativity, four-momentum (also called momentum–energy or momenergy) is the generalization of the classical three-dimensional momentum to four-dimensional...

In Newtonian mechanics, momentum (pl.: momenta or momentums; more specifically linear momentum or translational momentum) is the product of the mass and...

In quantum mechanics, the momentum operator is the operator associated with the linear momentum. The momentum operator is, in the position representation...

energy, the four-momentum (also called 4-momentum) is also called the energy–momentum 4-vector. Using an uppercase P to represent the four-momentum and a lowercase...

In physics, the energy–momentum relation, or relativistic dispersion relation, is the relativistic equation relating total energy (which is also called...

Angular momentum (sometimes called moment of momentum or rotational momentum) is the rotational analog of linear momentum. It is an important physical...

and solving for cross sections, one finds the slash notation used on four-momentum: using the Dirac basis for the gamma matrices, γ 0 = ( I 0 0 − I ) ...

coordinates combine into the four-position, and energy and momentum combine into the four-momentum. The components of these four-vectors depend on the frame...

reference frame).: ch1  Four-vectors describe, for instance, position xμ in spacetime modeled as Minkowski space, a particle's four-momentum pμ, the amplitude...

Mandelstam variables are numerical quantities that encode the energy, momentum, and angles of particles in a scattering process in a Lorentz-invariant...

stress–energy–momentum tensor or the energy–momentum tensor, is a tensor physical quantity that describes the density and flux of energy and momentum in spacetime...

equivalently, their frequency, may be determined from conservation of four-momentum. Seen another way, the photon can be considered as its own antiparticle...

relativity, four-force is a four-vector that replaces the classical force. The four-force is defined as the rate of change in the four-momentum of a particle...

L † . {\displaystyle u\rightarrow u^{\prime }=LuL^{\dagger }.} The four-momentum in APS can be obtained by multiplying the proper velocity with the mass...

(relativistic) mass times the speed of light squared. Systems whose four-momentum is a null vector (for example, a single photon or many photons moving...

Energy–momentum may refer to: Four-momentum Stress–energy tensor Energy–momentum relation This disambiguation page lists articles associated with the...

mechanics, the angular momentum operator is one of several related operators analogous to classical angular momentum. The angular momentum operator plays a...

The invariant mass is the ratio of four-momentum (the four-dimensional generalization of classical momentum) to four-velocity: p μ = m v μ {\displaystyle...

derived from time can be collected into four vectors, or four-dimensional tensors. The six-component angular momentum tensor is sometimes called a bivector...

2011's Drum 'n' Space. Walker released her second EP in 2018 titled Four-Momentum, which was followed a year later by her sixth album Trapezoid. She has...

operator defined from the momentum and angular momentum, used in the quantum-relativistic description of angular momentum. It is named after Wolfgang...

unit time that the particle will decay. For a particle of a mass M and four-momentum P decaying into particles with momenta p i {\displaystyle p_{i}} , the...

A photon rocket is a rocket that uses thrust from the momentum of emitted photons (radiation pressure by emission) for its propulsion. Photon rockets have...

the definition of the Lorentz factor. Physics portal Four-acceleration Four-momentum Four-force Four-gradient Algebra of physical space Congruence (general...

In special relativity, hidden momentum or hidden mechanical momentum is the mechanical momentum (mass times velocity) that is unaccounted for by Newtonian...

four-potential regardless of the gauge condition, analogous to the four-momentum that combines the momentum and energy of a particle. Using the four potential...

q^{2}=m_{X}^{2}} . The four-momentum q μ {\displaystyle q_{\mu }} of the virtual particle is the difference between the four-momenta of the incoming...

faster-than-light particle would have spacelike four-momentum, unlike ordinary particles that have time-like four-momentum. While some theories suggest the mass...

acceleration four-vector and the velocity four-vector are orthogonal. The invariant magnitude of the momentum 4-vector generates the energy–momentum relation:...

Population momentum is a consequence of the demographic transition. Population momentum explains why a population will continue to grow even if the fertility...