







Item type: | Article | ||||
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Journal or Publication Title: | Physical Review D | ||||
Publisher: | AMERICAN PHYSICAL SOC | ||||
Place of Publication: | COLLEGE PK | ||||
Volume: | 74 | ||||
Number of Issue or Book Chapter: | 7 | ||||
Date: | 2006 | ||||
Institutions: | Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Andreas Schäfer | ||||
Identification Number: |
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Keywords: | ELECTRON STORAGE-RING; (LAMBDA)OVER-BAR POLARIZATION; HERA; POLARIMETER; DECAYS; | ||||
Dewey Decimal Classification: | 500 Science > 530 Physics | ||||
Status: | Published | ||||
Refereed: | Yes, this version has been refereed | ||||
Created at the University of Regensburg: | Yes | ||||
Item ID: | 69788 |
Abstract
The transfer of polarization from a high-energy positron to a Lambda(0) hyperon produced in semiinclusive deep-inelastic scattering has been measured. The data have been obtained by the HERMES experiment at DESY using the 27.6 GeV longitudinally polarized positron beam of the HERA collider and unpolarized gas targets internal to the positron (electron) storage ring. The longitudinal spin-transfer ...

Abstract
The transfer of polarization from a high-energy positron to a Lambda(0) hyperon produced in semiinclusive deep-inelastic scattering has been measured. The data have been obtained by the HERMES experiment at DESY using the 27.6 GeV longitudinally polarized positron beam of the HERA collider and unpolarized gas targets internal to the positron (electron) storage ring. The longitudinal spin-transfer coefficient is found to be D-LL'(Lambda)=0.11 +/- 0.10(stat)+/- 0.03(syst) at an average fractional energy carried by the Lambda(0) hyperon < z >=0.45. The dependence of D-LL('Lambda) on both the fractional energy z and the fractional longitudinal momentum x(F) is presented.
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