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Underlying event

Index Underlying event

In physics, the underlying event (UE) is all what is seen in a hadron collider event which is not coming from the primary hard scattering (high energy, high momentum impact) process. [1]

4 relations: Event generator, Hadron collider, Initial and final state radiation, Scattering.

Event generator

Event generators are software libraries that generate simulated high-energy particle physics events.

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Hadron collider

A hadron collider is a very large particle accelerator built to test the predictions of various theories in particle physics, high-energy physics or nuclear physics by colliding hadrons.

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Initial and final state radiation

In particle physics, initial and final state radiation refers to certain kinds of radiative emissions that are not due to particle annihilation.

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Scattering is a general physical process where some forms of radiation, such as light, sound, or moving particles, are forced to deviate from a straight trajectory by one or more paths due to localized non-uniformities in the medium through which they pass.

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UE (underlying event).


[1] https://en.wikipedia.org/wiki/Underlying_event

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