An electron and a proton

If you are asking the definition here is your answer:--

Explanation:

Electrons are negatively charged particles that revolve around the nucleus of an atom. In QFT (Quantum field theory) Electrons are vibration of space in the positive energy field.

Protons are positively charged particles found in the nucleus of an atom held by the strong nuclear force. In QFT (Quantum field theory) protons are also different type of vibration in space in the direction of positive energy field.