These interactions are so powerful that, inside the proton, pairs of virtual quarks and anti-quarks (even as massive as charm) and pairs of virtual gluons (which is possible because these ...

Kaons, also known as K mesons, are strange (and sometimes anti-strange) beasts. Protons and neutrons are usually made up of ...

Most top quarks are produced in top–antitop pairs by the strong force. The production rate for this process is substantial (it has a cross-section of about 7 picobarns) and the presence of two ...