Spin transfer in deep-inelastic (Formula presented) electroproduction has been studied with the HERMES detector using the 27.6 GeV polarized positron beam in the DESY HERA storage ring. For an average fractional energy transfer (Formula presented) the longitudinal spin transfer from the virtual photon to the (Formula presented) has been extracted. The spin transfer along the (Formula presented) momentum direction is found to be (Formula presented) similar values are found for other possible choices for the longitudinal spin direction of the (Formula presented) This result is the most precise value obtained to date from deep-inelastic scattering with charged lepton beams, and is sensitive to polarized up quark fragmentation to hyperon states. The experimental result is found to be in general agreement with various models of the (Formula presented) spin content, and is consistent with the assumption of helicity conservation in the fragmentation process.
|Original language||English (US)|
|Number of pages||1|
|Journal||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|State||Published - 2001|
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)