Thus in this period, free neutrons are constantly trying to decay to form protons and electrons; but energetic proton-electron collisions go on remaking neutrons.

If the world had been created without the exclusion principle, quarks would not form separate, well-defined protons and neutrons.

When the universe was 0.00001 seconds old, quarks combined to form protons and neutrons.

We need to do measurements to guide the theory of how quarks form protons and nuclei.

How do we form protons and neutrons?

The quarks are bound together by gluons, the carriers of the strong force, to form protons, neutrons and their subatomic kin.

Among quarks, which form protons and neutrons, physicists have observed a subtle matter-antimatter imbalance, called CP violation, in the behavior of particles known as mesons.

The gluon holds together quarks to form protons and neutrons.

In an incredible split-second sequence of events, the newborn universe cooled enough to form neutrons and protons and then these fused to form atomic nuclei.

The residual strong force is a minor residuum of the strong interaction which binds quarks together to form protons and neutrons.