Charm hadroproduction results from Selex

TL;DR

This paper reports on the SELEX experiment's high-statistics measurements of charm baryon production using 650 GeV beams, highlighting the spectrometer's features and presenting results on charm particle yields and asymmetries.

Contribution

It provides new experimental data on charm hadroproduction at high x_F with detailed spectrometer performance and analysis of charm baryon asymmetries.

Findings

Measured charm baryon production cross sections

Observed asymmetries in Lambda_c production

Analyzed charm particle yields for different beams

Abstract

The SELEX experiment (E781) is 3-stage magnetic spectrometer for a high statistics study of hadroproduction of charm baryons out to large x_F using 650 Gev Sigma-, pi- and p beams. The main features of the spectrometer are: a high precision silicon vertex system, powerful particle identification provided by TRD and RICH, forward Lambda decay spectrometer and 3-stage lead glass photon detector. An experiment overview and spectrometer features are shown. Reconstructed charm states and results on Lambda_c, D+ particles and antiparticles produced by Sigma-, pi- and p beams at x_F>0.3 and asymmetry for Lambda_c are presented.