Hyperon Physics Results from SELEX
Ivo Eschrich (MPI f. Kernphysik, Heidelberg) (on behalf of the SELEX, Collaboration)
TL;DR
The SELEX experiment at Fermilab investigates hyperon properties using a high-energy beam, providing new measurements of hyperon charge radius, cross sections, and radiative widths, advancing understanding of hyperon structure.
Contribution
This paper presents the first results from SELEX on hyperon properties, including charge radius, cross sections, and radiative width limits, using a novel high-energy hyperon beam and advanced detection systems.
Findings
Measured ^- charge radius.
Determined total ^- nucleon cross sections.
Established new upper limit for ^-*(1385) radiative width.
Abstract
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% \Sigma^- and \pi^- each. The three-stage magnetic spectrometer covering 0.1 <= x_F <= 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 \Sigma^- charge radius, total (\Sigma^-)-nucleon cross sections, and a new upper limit for the radiative width of the \Sigma^-*(1385) are presented.
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