Hyperon physics results from SELEX Available to Purchase

In parallel to charm hadroproduction the experiment SELEX (E781) at Fermilab is pursuing a rich hyperon physics program. SELEX employs a 600 GeV/c beam consisting of $50% Σ−$ and $π−$ each. The three-stage magnetic spectrometer covering $0.1⩽xF⩽1.0$ features a high-precision silicon vertex system, broad-coverage particle identification using TRD and RICH, and a three-stage lead glass photon calorimeter. First results for the $Σ−$ charge radius, total $Σ−$-nucleon cross sections, and a new upper limit for the radiative width of the $Σ(1385)−$ are presented.