10:30 AM–12:18 PM, Friday, October 24, 2008
- Room 208
Chair: Edward Kinney, University of Colorado at Boulder
Abstract ID: BAPS.2008.DNP.CB.1
10:30 AM–11:06 AM
Ernst Sichtermann
(Lawrence Berkeley Laboratory)
We report on measurements of the longitudinal spin transfer $D_ {LL}$ in the inclusive production of $\Lambda$ and $\bar{ \Lambda}$ hyperons in 200\,GeV longitudinally polarized proton- proton collisions. At large transverse momenta $D_{LL}$ is sensitive to the helicity distributions of strange quarks and anti-quarks in the polarized proton, and to polarized fragmentation functions. The data were collected with the Solenoid Tracker At RHIC (STAR) in 2005 and correspond to a sampled integrated luminosity of $\sim\!3\mathrm{pb}^{-1}$ and $\sim\!50\%$ beam polarization. Preliminary results on $D_{LL}$, covering mid-rapidity and transverse hyperon momenta up to 4 GeV/c, will be presented and followed by an outlook on future hyperon spin transfer measurements.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2008.DNP.CB.1