Question

What is the antiparticle of a proton?

Answer 1

Hint: In order to solve this question, we are going to first write what an antiparticle of the proton is and then, we are going to explain the properties of that antiparticle. After that, some of the differences between the proton and its antiparticle are noted down in this question.

Complete step-by-step answer:
The antiparticle of a proton is called an antiproton. An antiproton is the antiparticle of the proton that is stable. The antiprotons are typically short-lived, since any collision with a proton will cause both particles to be annihilated in a burst of energy. The antiproton has a charge equal to negative of that of a proton. Thus, the charge of an antiproton is $$-1$$while that of a proton is$$+1$$.
The antiproton was first experimentally confirmed in $$1955$$ at the Bevatron particle accelerator by University of California, Berkeley physicists Emilio Segrè and Owen Chamberlain, for which they were awarded the $$1959$$ Nobel Prize in Physics.
In terms of the valence quarks, an antiproton consists of an up antiquark and a down anti-quark. Although all the properties of the antiproton are similar to that of the proton but in terms of the electric charge and the magnetic moment, they do differ as they have the exact opposite electric charges and the magnetic moment.

Note: It is important to note that the antiprotons have traces back from the cosmic rays as the antiprotons are produced when the cosmic rays go on colliding with each other. The reaction for the production is:
$$p+A\to p+\overline{p}+p+A$$