Charge Asymmetries for D, D_s and Lambda_c Production in Sigma- - Nucleus Interactions at 340 GeV/c

TL;DR

This paper reports on the observation of charge asymmetries in the production of charmed particles in Sigma- nucleus interactions at 340 GeV/c, highlighting differences based on quark content and comparing with other experimental and theoretical data.

Contribution

It presents the first detailed measurement of charge asymmetries in charmed particle production in Sigma- induced interactions at high energy.

Findings

Significant production asymmetries between particle-antiparticle pairs.

Comparison with pion beam data shows differences in asymmetry patterns.

Results align with certain theoretical predictions.

Abstract

CERN experiment WA89 has studied charmed particles produced by a Sigma^- beam at 340 GeV/c on nuclear targets. Production of particles which have light quarks in common with the beam is compared to production of those which do not. Considerable production asymmetries between D^- and D^p, D_s^ and D_s^+ and Lambda_c and Antilambda_c are observed. The results are compared with pion beam data and with theoretical calculations.