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The Standard Model Of Particle Physics

CERN: The Standard Model Of Particle Physics

The Standard Model Of Particle Physics. This film was produced as part of the CERN/ATLAS multimedia contest internship.

The standard model of particle physics is a theory concerning the electromagnetic, weak and strong nuclear interactions which mediate the dynamics of the known subatomic particles. Developed throughout the early and middle 20th century, the current formulation was finalized in the mid 1970s upon experimental confirmation of the existence of quarks. Since then, discoveries of the bottom quark (1977), the top quark (1995) and the tau neutrino (2000) have given credence to the standard model. Because of its success in explaining a wide variety of experimental results, the standard model is sometimes regarded as a theory of almost everything.

Still, the standard model falls short of being a complete theory of fundamental interactions because it does not incorporate the physics of general relativity, such as gravitation and dark energy. The theory does not contain any viable dark matter particle that possesses all of the required properties deduced from observational cosmology. It also does not correctly account for neutrino oscillations (and their non-zero masses). Although the standard model is theoretically self-consistent, it has several unnatural properties giving rise to puzzles like the strong CP problem and the hierarchy problem.

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Nevertheless, the standard model is important to theoretical and experimental particle physicists alike. For theoreticians, the standard model is a paradigm example of a quantum field theory, which exhibits a wide range of physics including spontaneous symmetry breaking, anomalies, non-perturbative behavior, etc. It is used as a basis for building more exotic models which incorporate hypothetical particles, extra dimensions and elaborate symmetries (such as supersymmetry) in an attempt to explain experimental results at variance with the Standard Model such as the existence of dark matter and neutrino oscillations. In turn, the experimenters have incorporated the standard model into simulators to help search for new physics beyond the standard model from relatively uninteresting background.

Recently, the standard model has found applications in other fields besides particle physics such as astrophysics and cosmology, in addition to nuclear physics.

Standard Model Animation

This film was produced as part of the ATLAS multimedia contest internship, 2009

Produced by: Claudia Marcelloni
Director: Phil Owen
Presented by: Jonas Strandberg (PhD Univ. of Michigan) and Tobias Golling (PhD Yale Univ.)
5:15 min. / 10 February 2010 / CERN ATLAS Copyright

Windows Media Player

http://cdsweb.cern.ch/record/1279356

El modelo estándar de la física de partículas es una teoría que describe las relaciones entre las interacciones fundamentales conocidas entre partículas elementales que componen toda la materia. Es una teoría cuántica de campos desarrollada entre 1970 y 1973 que es consistente con la mecánica cuántica y la relatividad especial. Hasta la fecha, casi todas las pruebas experimentales de las tres fuerzas descritas por el modelo estándar están de acuerdo con sus predicciones. Sin embargo, el modelo estándar no alcanza a ser una teoría completa de las interacciones fundamentales debido a que no incluye la gravedad, la cuarta interacción fundamental conocida, y debido también al número elevado de parámetros numéricos (tales como masas y constantes que se juntan) que se deben poner a mano en la teoría (en vez de derivarse a partir de primeros principios).

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Atom – 1 – Choque de titanes
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Atom – 2 – La clave del cosmos
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Atom – 3 – La ilusión de la realidad
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Monday, July 26th, 2010, by admin and is filed under "Alice experiment, Astrofisica, Atlas experiment, Atomo, CERN, Ciencia, CMS experiment, Cosmologia, Fermilab, Fisica, Fisica de alta energia, Fisica de particulas, Fisica Nuclear, Fisica Teorica, Ingenieria, Internacional, Investigacion, LHC, LHCB experiment, Matematicas, Mecanica cuantica, Science, Sincrotrón, Technology, Tecnologia, Tevatron, Universidad, Universo | , Astrofisica, CERN, Ciencia, Cosmologia, Fermilab, Fisica, Fisica de particulas, Fisica Nuclear, Fisica Teorica, Internacional, Investigacion, LHC, Matematicas, Mecanica cuantica, Modelo estandar, Science, STANDARD MODEL, Tevatron, Universo ". You can leave a response here, or send a Trackback from your own site.