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  2. Decay theory - Wikipedia

    en.wikipedia.org/wiki/Decay_theory

    The Decay theory is a theory that proposes that memory fades due to the mere passage of time. Information is therefore less available for later retrieval as time passes and memory, as well as memory strength, wears away. [1] When an individual learns something new, a neurochemical "memory trace" is created.

  3. Fermi's interaction - Wikipedia

    en.wikipedia.org/wiki/Fermi's_interaction

    Fermi's Theory was the first theoretical effort in describing nuclear decay rates for β decay. The interaction could also explain muon decay via a coupling of a muon, electron-antineutrino, muon-neutrino and electron, with the same fundamental strength of the interaction. This hypothesis was put forward by Gershtein and Zeldovich and is known ...

  4. Distance decay - Wikipedia

    en.wikipedia.org/wiki/Distance_decay

    Distance decay is a geographical term which describes the effect of distance on cultural or spatial interactions. [1] The distance decay effect states that the interaction between two locales declines as the distance between them increases. Once the distance is outside of the two locales' activity space, their interactions begin to decrease.

  5. Proton decay - Wikipedia

    en.wikipedia.org/wiki/Proton_decay

    Proton decay. The pattern of weak isospins, weak hypercharges, and color charges for particles in the Georgi–Glashow model. Here, a proton, consisting of two up quarks and a down, decays into a pion, consisting of an up and anti-up, and a positron, via an X boson with electric charge − 4 3 e. In particle physics, proton decay is a ...

  6. Advertising adstock - Wikipedia

    en.wikipedia.org/wiki/Advertising_Adstock

    Advertising adstock or advertising carry-over is the prolonged or lagged effect of advertising on consumer purchase behavior. Adstock is an important component of marketing-mix models. The term "adstock" was coined by Simon Broadbent. [1] Adstock is a model of how the response to advertising builds and decays in consumer markets.

  7. Exponential decay - Wikipedia

    en.wikipedia.org/wiki/Exponential_decay

    Exponential decay is a scalar multiple of the exponential distribution (i.e. the individual lifetime of each object is exponentially distributed), which has a well-known expected value. We can compute it here using integration by parts .

  8. Grand Unified Theory - Wikipedia

    en.wikipedia.org/wiki/Grand_Unified_Theory

    In addition to Standard Model particles, the theory includes twelve colored X bosons, responsible for proton decay. SU(5) is the simplest GUT. The smallest simple Lie group which contains the standard model , and upon which the first Grand Unified Theory was based, is

  9. Georgi–Glashow model - Wikipedia

    en.wikipedia.org/wiki/Georgi–Glashow_model

    Georgi–Glashow model. The pattern of weak isospins, weak hypercharges, and strong charges for particles in the Georgi–Glashow model, rotated by the predicted weak mixing angle, showing electric charge roughly along the vertical. In addition to Standard Model particles, the theory includes twelve colored X bosons, responsible for proton decay.