Recent Results on Charm and Hyperon Physics from SELEX

TL;DR

This paper reports recent measurements from the SELEX experiment on charm hadron lifetimes, production rates, and hyperon properties, providing new insights into charm and hyperon physics at high x_F.

Contribution

It presents new precise measurements of charm hadron lifetimes and hyperon properties using the SELEX spectrometer, advancing understanding of charm and hyperon production and structure.

Findings

Precise Lambda_c, D0, and Ds lifetimes measured.

Charm production rates for x_F>0.2 reported.

Hyperon polarization and charge radius measurements obtained.

Abstract

The SELEX experiment (Fermilab E781) is a 3-stage magnetic spectrometer for the study of charm hadroproduction at large x_F using 600GeV/c Sigma-, pi-, and p beams. New precise measurements of the Lambda_c, D0, and Ds lifetimes are presented. Results on Lambda_c and D_s production for x_F>0.2 are reported as well. The spectrometer was also used for hyperon physics, where we will show measurements of the Sigma- charge radius, the polarization of inclusive produced Lambda's, and the polarization of beam Sigma+.