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Beyond the Standard Model

Standard Model Evidence Hierarchy problem • Dark matter Cosmological constant problem Strong CP problem Neutrino oscillation Theories Technicolor Kaluza–Klein theory Grand Unified Theory Theory of everything String theory Supersymmetry MSSM • Superstring theory Supergravity Quantum gravity String theory Loop quantum gravity Causal dynamical triangulation Canonical general relativity Experiments Gran Sasso • INO • LHC SNO • Super-K • Tevatron

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In physics, the Standard Model of particle physics is currently the best description of all experimental data.^[1] Nevertheless, there are reasons to think that there are phenomena that are not accurately described by this theory and "Beyond the Standard Model" physics studies possible extensions to the Standard Model that will be probed in up-coming experiments.

There are several areas where "Beyond the Standard Model" physics focuses:

• the hierarchy problem
• the missing matter problem (dark matter and dark energy)
• the cosmological constant problem
• the strong CP problem

In addition to these subjects, there are also attempts at relating different phenomena and parameters to a more fundamental theory. A partial classification of these attempts are

• gauge coupling unification
• a theory of quark masses and mixings
• a theory of neutrino masses and mixings

[edit] See also

• Big Bang
• Fundamental physical constants: The Standard Model
• Holographic principle
• String theory
• Theory of everything
• Unsolved problems in physics
• Quantum mechanics
• Quantum triviality

[edit] References

1. ^ Stanford Linear Accelerator Center Virtual Visitor Center

[edit] External resources

• Scientific American Apr 2006
• LHC. Nature July 2007
• Open Questions
• Working group - schedule
• Les Houches Conference, Summer 2005

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