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.