Recent Results from SELEX
The SELEX Collaboration, J.Russ, et al
TL;DR
The SELEX experiment reports new precise measurements of charm hadron lifetimes and production asymmetries at high Feynman-x, supporting color-drag models of charm production.
Contribution
This paper provides the first precise lifetime measurements and production asymmetry results for charm hadrons using high-energy fixed-target experiments.
Findings
Measured Lambda_c, D0, Ds lifetimes with high precision
Observed production asymmetries consistent with color-drag models
Data at xF>0.2 support theoretical predictions
Abstract
The SELEX experiment (E781) is 3-stage magnetic spectrometer for the study of charm hadroproduction at large xF using 600 Gev Sigma-, pi- and p beams. New precise measurements of the Lambda_c, D0, and Ds lifetimes are presented. We also report results on Lambda_c and Ds production by Sigma-, pi- and p beams at xF>0.2. The data agree with expectations from color-drag models to explain charm particle/antiparticle production asymmetries.
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Taxonomy
TopicsSuperconducting Materials and Applications · High-Energy Particle Collisions Research · Particle physics theoretical and experimental studies