Can anti-matter protons annihilate with matter protons or is it only matter and anti-matter quarks that can annihilate?

4 minutes ago, Brainee said:

Can anti-matter protons annihilate with matter protons or is it only matter and anti-matter quarks that can annihilate?

Yes, anti-protons and protons annihilate.

What about matter quarks and anti-matter quarks, do they annihilate?

6 minutes ago, Brainee said:

What about matter quarks and anti-matter quarks, do they annihilate?

Any particle-antiparticle pair can annihilate.

Is quark a particle?

 

Just now, Brainee said:

Is quark a particle?

 

There are particles called quarks.

1 hour ago, Brainee said:

Is quark a particle?

 

Yes and there are antiquarks. An antiproton is composed of 3 antiquarks, for instance. So whether you consider hadrons or the quarks that make them up, it comes to the same thing: they can annihilate with the appropriate antiparticle.