Determine whether the following decay for the charged pion π−\pi^-π− is possible:
π−→μ−+νe \pi^- \to \mu^- + \nu_{\text{e}} π−→μ−+νeState the quark configurations of the positive kaon K+\text{K}^+K+ and the negative kaon K−\text{K}^-K−.
A student suggests that both the neutral pion π0\pi^0π0 and the neutron n\text{n}n are their own antiparticles because they both have a net charge of zero.
Discuss whether this suggestion is correct, referencing their quark configurations or other conserved quantum numbers.
50 exam-style questions on AQA A Level Physics Particles, covering Constituents of the atom, Stable and unstable nuclei, Particles, antiparticles and photons, Particle interactions, Classification of particles, Quarks and antiquarks, and Applications of conservation laws. Each one has a worked solution and a mark scheme showing where the marks go.