What are quarks?

Some articles on quarks, quark:

List Of Baryons
... Baryons are the family of composite particle made of three quarks, as opposed to the mesons which are the family of composite particles made of one quark and one antiquark ... Both baryons and mesons are part of the larger particle family comprising all particles made of quarks – the hadron ... showed the existence of pentaquarks – "exotic" baryons made of four quarks and one antiquark ...
Strangelet - Theoretical Possibility - Strange Matter Hypothesis
... The known particles with strange quarks are unstable because the strange quark is heavier than the up and down quarks, so strange particles, such as the Lambda particle, which contains ... But states with a larger number of quarks might not suffer from this instability ... According to this hypothesis, when a large enough number of quarks are collected together, the lowest energy state is one which has roughly equal numbers of up, down ...
HERMES Experiment - Method
... The virtual photon emitted by the electron is also polarized and so seeks out quarks of spin in the same direction as the photon ... The asymmetry of ejected quarks is found to deduce the net polarisation of the quarks ...
Strangelet - Theoretical Possibility - Relationship With Nuclei
... A nucleus is a collection of a large number of up and down quarks, confined into triplets (neutrons and protons) ... starts making a nucleus into a strangelet, the first few strange quarks form strange baryons, such as the Lambda, which are heavy ... occur almost simultaneously will the number of strange quarks reach the critical proportion required to achieve a lower energy state ...
Particle Accelerator - Uses - High-energy Physics
... electrons and positrons) and quarks for the matter, or photons and gluons for the field quanta ... Since isolated quarks are experimentally unavailable due to color confinement, the simplest available experiments involve the interactions of, first, leptons with each other, and ... To study the collisions of quarks with each other, scientists resort to collisions of nucleons, which at high energy may be usefully considered as essentially 2-body interactions of the quarks and gluons of ...