CBM Performance for Λ Hyperon Directed Flow Measurements in Au + Au Collisions at 12A GeV/c

Λ̄–hyperon global polarization in Au+Au collisions at RHIC

We present the Λ̄–hyperon global polarization in Au+Au collisions at √ sNN = 62 GeV and 200 GeV measured with the STAR detector at RHIC. The observed Λ̄–hyperon global polarization is consistent with zero, what is in agreement with recent measurements of Λ global polarization, as well as φ(1020) and K(892) vector mesons spin alignment with respect to the reaction plane. The possible dependence of...

Directed flow in Au plus Au collisions at root s(NN)=62.4 GeV

Centrality dependence of hyperon global polarization in Au+Au collisions at RHIC

We present the centrality dependence of Λ and Λ̄ hyperon global polarization in Au+Au collisions at √ sNN = 62 GeV and 200 GeV measured with the STAR detector at RHIC. Within the precision of the measurement, we observe no centrality dependence of Λ and Λ̄ hyperon global polarization and within our acceptance it is consistent with zero. Different sources of systematic uncertainties (feed down eff...

Scaling properties of hyperon production in Au+Au collisions at root s(NN)=200 GeV

Nonmesonic decay of the Λ-hyperon in hypernuclei produced by p+Au collisions

The lifetime of the Λ-hyperon for the nonmesonic decay ΛN → NN has been determined by a measurement at COSY Jülich of the delayed fission of heavy hypernuclei produced in proton Au collisions at Tp=1.9 GeV. It is found that heavy hypernuclei with mass numbers A≈(180±5) and atomic numbers Z≈(74±2) fission with a lifetime τΛ=130 ± 13(stat.) ± 15(syst.) ps. This value together with the results obt...