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  2. Representative layer theory - Wikipedia

    en.wikipedia.org/wiki/Representative_Layer_Theory

    The spectroscopic properties of a representative layer can be derived from the spectroscopic properties of particles, which may be determined by a wide variety of ways. [3] While a representative layer could be used in any theory that relies on the mathematics of plane parallel layers, there is a set of definitions and mathematics, some old and ...

  3. Automatic calculation of particle interaction or decay

    en.wikipedia.org/wiki/Automatic_calculation_of...

    Particle accelerators or colliders produce collisions (interactions) of particles (like the electron or the proton). The colliding particles form the Initial State. In the collision, particles can be annihilated or/and exchanged producing possibly different sets of particles, the Final States.

  4. Particle physics and representation theory - Wikipedia

    en.wikipedia.org/wiki/Particle_physics_and...

    There is a natural connection between particle physics and representation theory, as first noted in the 1930s by Eugene Wigner. [1] It links the properties of elementary particles to the structure of Lie groups and Lie algebras.

  5. Knudsen number - Wikipedia

    en.wikipedia.org/wiki/Knudsen_number

    The Knudsen number is a dimensionless number defined as =, where = mean free path [L 1], = representative physical length scale [L 1].. The representative length scale considered, , may correspond to various physical traits of a system, but most commonly relates to a gap length over which thermal transport or mass transport occurs through a gas phase.

  6. List of atmospheric dispersion models - Wikipedia

    en.wikipedia.org/wiki/List_of_atmospheric...

    Representative ash particles are initiated at the volcano's location and then allowed to advect, diffuse, and settle within the atmosphere. The location of the particles at any time after the eruption can be viewed using the post-processing software included with the model.

  7. List of particles - Wikipedia

    en.wikipedia.org/wiki/List_of_particles

    Elementary particles are particles with no measurable internal structure; that is, it is unknown whether they are composed of other particles. [1] They are the fundamental objects of quantum field theory. Many families and sub-families of elementary particles exist. Elementary particles are classified according to their spin.

  8. Diffuse reflectance spectroscopy - Wikipedia

    en.wikipedia.org/wiki/Diffuse_reflectance...

    Additionally, Giovanelli's treatment makes the implied assumption of infinitesimal particles.) They developed a scheme, subject to the limitations of a two-flux model, to calculate the "scatter corrected absorbance" for a sample. [27] The decadic absorbance of a scattering sample is defined as −log 10 (R+T) or −log 10 (1−A).

  9. Mathematical formulation of the Standard Model - Wikipedia

    en.wikipedia.org/wiki/Mathematical_formulation...

    The spin-half particles have no right/left chirality pair with the same SU(2) representations and equal and opposite weak hypercharges, so assuming these gauge charges are conserved in the vacuum, none of the spin-half particles could ever swap chirality, and must remain massless. Additionally, we know experimentally that the W and Z bosons are ...