These particles are called "quarks" and they come in six different "flavors" but Jaffe only looked at the most common quarks: the 'up,' 'down' and 'strange'.
Only the Up and Down quarks are found inside atoms of the normal matter. The other quarks are made in particle accelerators.
普通正常物质的原子内部只有上、下夸克。而其它夸克是由粒子加速器产生的。
3
This first recorded particle is a meson composed of an anti-beauty quark – the beauty quark's antiparticle – and an up quark – one of the two common quarks that make up protons and neutrons.