A constituent quark that does not participate in the elementary weak vertex of a meson decay. It combines with a produced quark or antiquark in the final hadron.

Bottom quark ( $b$ )

 0  0

Charm quark ( $c$ )

 0  0

Charm antiquark ( $\overset{c}{ˉ}$ )

 0  0

Strange quark ( $s$ )

 2  0

Strange antiquark ( $\overset{s}{ˉ}$ )

 0  0

The antiparticle of the strange quark has electric charge

+ 1/3

and baryon number

- 1/3

Down quark ( $d$ )

 1  0

Down antiquark ( $\overset{ˉ}{d}$ )

 0  0

The antiparticle of the down quark has electric charge

+ 1/3

and baryon number

- 1/3

Up quark ( $u$ )

 1  0

Antiquark

 0  0

The antiparticle of a quark.

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Quark by

Ciro Santilli  40 Updated 2025-07-16

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TODO experimental discovery.

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Quark

Spectator quark

Bottom quark ( $b$ )

Charm quark ( $c$ )

Charm antiquark ( $\overset{c}{ˉ}$ )

Strange quark ( $s$ )

Strange antiquark ( $\overset{s}{ˉ}$ )

Down quark ( $d$ )

Down antiquark ( $\overset{ˉ}{d}$ )

Up quark ( $u$ )

Antiquark

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