Particle Physics Questions![]() Q14. The diagram represents the decay of a particle X into a particle Y and two other particles. The quark structure of particles X and Y are shown in the diagram. (a) Deduce the name of particle X. udd has zero charge - is a neutron udu has a charge of +1 - is a proton n X is a neutron [1 mark] (b) State the type of interaction that occurs in this decay. Weak interaction [1 mark] (c) State the class of particles to which the W− belongs. Bosons [1 mark] (d) Show clearly how charge and baryon number are conserved in this interaction. You should include reference to all the particles, including the quarks, in your answer. udd (baryon) n Charge: (+2/3, -1/3, -1/3) (0)
Baryon number: (+1/3, +1/3, +1/3) 1
[2 marks] (e) Name the only stable baryon. proton [1 mark] (f) A muon is an unstable particle. State the names of the particles that are produced when a muon decays. Electron, an electron anti-neutrino and a muon neutrino OR Positron, an electron neutrino and a muon anti-neutrino
[1 mark] (Total 7 marks) |
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