How can quarks change?

Up and down quarks have the lowest masses of all quarks. The heavier quarks rapidly change into up and down quarks through a process of particle decay: the transformation from a higher mass state to a lower mass state.

How are strange quarks produced?

The abundance of strange quarks is formed in pair-production processes in collisions between constituents of the plasma, creating the chemical abundance equilibrium. The dominant mechanism of production involves gluons only present when matter has become a quark–gluon plasma.

What does up quark decay into?

Up quark

Composition	Elementary particle
Theorized	Murray Gell-Mann (1964) George Zweig (1964)
Discovered	SLAC (1968)
Mass	2.2+0.5 −0.4 MeV/c2
Decays into	Stable or Down quark + Positron + Electron neutrino

How was the quark theory confirmed?

A physicist named Murray Gell-Mann conceived of the quark— super-tiny, point-like subatomic particles that combine to form protons and neutrons— in order to explain the particle collision results. Having confirmed the existence of each type of quark, attention turned to combinations of quarks.

Is quark a theory?

According to prevailing theory, quarks have mass and exhibit a spin (i.e., type of intrinsic angular momentum corresponding to a rotation around an axis through the particle). Quarks appear to be truly fundamental. They have no apparent structure; that is, they cannot be resolved into something smaller.

How does quark look like?

A simplified description can be found here. Due to a phenomenon known as color confinement, quarks are never directly observed or found in isolation; they can be found only within hadrons, such as baryons (of which protons and neutrons are examples), and mesons.

What do strange quarks do?

Like all quarks, the strange quark is an elementary fermion with spin 12, and experiences all four fundamental interactions: gravitation, electromagnetism, weak interactions, and strong interactions. …