14 relations: CERN, CompHEP, Cross section (physics), Event (particle physics), Event generator, Fermilab, Fortran, France, Les Houches, Matrix coefficient, Particle decay, Particle physics, Probability density function, PYTHIA.

## CERN

The European Organization for Nuclear Research (Organisation européenne pour la recherche nucléaire), known as CERN (derived from the name Conseil européen pour la recherche nucléaire), is a European research organization that operates the largest particle physics laboratory in the world.

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## CompHEP

is a software package for automatic computations in High Energy Physics from Lagrangians to collision events or particle decays.

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## Cross section (physics)

When two particles interact, their mutual cross section is the area transverse to their relative motion within which they must meet in order to scatter from each other.

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## Event (particle physics)

In particle physics, an event refers to the results just after a fundamental interaction took place between subatomic particles, occurring in a very short time span, at a well-localized region of space.

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## Event generator

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

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## Fermilab

Fermi National Accelerator Laboratory (Fermilab), located just outside Batavia, Illinois, near Chicago, is a United States Department of Energy national laboratory specializing in high-energy particle physics.

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## Fortran

Fortran (formerly FORTRAN, derived from Formula Translation) is a general-purpose, compiled imperative programming language that is especially suited to numeric computation and scientific computing.

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## France

France, officially the French Republic (République française), is a sovereign state whose territory consists of metropolitan France in Western Europe, as well as several overseas regions and territories.

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## Les Houches

Les Houches is a commune in the Haute-Savoie department and Auvergne-Rhône-Alpes region of eastern France.

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## Matrix coefficient

In mathematics, a matrix coefficient (or matrix element) is a function on a group of a special form, which depends on a linear representation of the group and additional data.

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## Particle decay

Particle decay is the spontaneous process of one unstable subatomic particle transforming into multiple other particles.

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## Particle physics

Particle physics (also high energy physics) is the branch of physics that studies the nature of the particles that constitute matter and radiation.

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## Probability density function

In probability theory, a probability density function (PDF), or density of a continuous random variable, is a function, whose value at any given sample (or point) in the sample space (the set of possible values taken by the random variable) can be interpreted as providing a relative likelihood that the value of the random variable would equal that sample.

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## PYTHIA

PYTHIA is a computer simulation program for particle collisions at very high energies (see event (particle physics)) in particle accelerators.

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