In
particle physics
Particle physics or high-energy physics is the study of Elementary particle, fundamental particles and fundamental interaction, forces that constitute matter and radiation. The field also studies combinations of elementary particles up to the s ...
, the hidden sector, also known as the dark sector, is a hypothetical collection of yet to be observed
quantum fields and their corresponding hypothetical
particles. The interactions between the hidden sector particles and the
Standard Model
The Standard Model of particle physics is the Scientific theory, theory describing three of the four known fundamental forces (electromagnetism, electromagnetic, weak interaction, weak and strong interactions – excluding gravity) in the unive ...
particles are weak, indirect, and typically mediated through
gravity or other new particles. Examples of new hypothetical mediating particles in this class of theories include the
dark photon,
sterile neutrino, and
axion.
In many cases, hidden sectors include a new
gauge group that is independent from the Standard Model gauge group. The hidden sectors are commonly predicted by the models from
string theory. They may be relevant as a source of
dark matter and
supersymmetry breaking, solving the
Muon g-2 anomaly and
beryllium-8 decay anomaly.
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See also
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Fifth force
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Dark energy
*
Dark matter
*
Dark radiation
*
Higgs sector
References
Physics beyond the Standard Model
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