- Conference date: September 1982
- Location: Upton, NY, USA
We report preliminary results from Fermilab experiment E497 on the production polarizations of Σ+ and Σ− hyperons. Hyperons were produced inclusively at non zero production angles by 400 GeV/c protons incident on a Cu target. The polarization was analyzed by the weak decay asymmetry in the hadronic decay modes Σ+→pπ0 and Σ−→ηπ−. Based upon samples of 38,000 Σ+ and 317,000 Σ− decays we observed polarizations as a function of Pt which average 22% at an X of 0.53 for Σ+ and 40% at X of 0.68 and 0.78 for Σ−. The direction of polarization for both Σ+ and Σ− is in the direction of K− p x K− Σ where the K’s are the momentum vectors of the incident proton and producced hyperon respectively. This is opposite to the direction of polarization of inclusively produced lambdas.
MOST READ THIS MONTH
MOST CITED THIS MONTH
Article metrics loading...