The negative cascade particle Ξ−\Xi^-Ξ− is a baryon with a strangeness of -2.
One possible decay for a Ξ−\Xi^-Ξ− is:
Ξ−→Λ0+π− \Xi^- \to \Lambda^0 + \pi^- Ξ−→Λ0+π−Deduce the quark structure of a Ξ−\Xi^-Ξ−.
State and explain which interaction is involved in this decay.
An antiparticle of the negative cascade particle decays into an anti-lambda particle (Λˉ0\bar{\Lambda}^0Λˉ0) and particle Y. Identify Y.
The rest energy of a Ξ−\Xi^-Ξ− is equal to the energy of a photon with a frequency of 3.19 × 1023 Hz. Determine, in MeV\text{MeV}MeV, the rest energy of a Ξ−\Xi^-Ξ−.
The discovery of short-lived particles such as the Ξ−\Xi^-Ξ− is made by large international collaborations. Suggest one reason why such collaborations are necessary.
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.