(d) The nucleus is held together by a force. It was predicted that a particle exists that is responsible for this force. The particle itself must experience this force. The particle would have a rest energy between that of an electron and half that of a nucleon. Discuss whether a kaon, a muon and a pion each have the properties of the predicted particle. Information about these three particles is in the Data and Formulae Booklet. (Total 9 6. A physicist, who is attempting to analyse a nuclear event, suggests that a 7 particle and a particle. proton collided and were annihilated with the creation of a neutron, a n* particle, and a K- it and K particles are mesons. The baryon and lepton numbers of both these mesons are zero. (a) Write down the equation that represents this interaction. Swindon Academy