Can anyone please tell me what are preons.

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SUMMARY

Preons are theoretical particles that are proposed as subcomponents of quarks and leptons, which are the fundamental constituents of matter. They are believed to occupy no space and predate the Standard Model of particle physics. Currently, there is no widely accepted preon model that successfully reproduces known particles or accounts for their masses, quantum numbers, and interactions. The motivation for preon models arises from the desire to simplify the large number of fundamental particles in the universe, which include six quarks, six leptons, and several gauge bosons.

PREREQUISITES
  • Understanding of particle physics concepts, including quarks and leptons.
  • Familiarity with the Standard Model of particle physics.
  • Knowledge of quantum numbers and their significance in particle interactions.
  • Basic grasp of theoretical physics and model building.
NEXT STEPS
  • Research the current theories and models of preons in particle physics.
  • Explore the implications of preon models on the Standard Model.
  • Study the role of quantum numbers in particle classification.
  • Investigate experimental evidence for or against the existence of preons.
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Physicists, students of theoretical physics, and anyone interested in advanced particle physics concepts and the quest for a unified model of fundamental particles.

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Can anyone please tell me what are preons. I searched wikipedia, google scholar and many other sites but all I got is that they occupy 0 space and that that they are older than the standard model itself!
 
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Afaik there is no common accepted preon model that is able to reproduce the known particles, account for their masses, quantum numbers and interactions. Preon models were considered due to the fact that there are now many fundamental particles (6 quarks, 6 leptons, the W, Z, photon and gluon gauge bosons, perhaps 1 Higgs) and that one would like to reduce this large number to a smaller set of fundamental objects.
 

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