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Title: Transverse polarization of Λ and Λ produced inclusively in eN scattering at HERMES

Abstract

The transverse polarization of inclusively produced Λ and Λ -hyperons has been studied at HERMES using the 27.6 GeV positron beam of HERA and an internal gas target. From the data taken in the years 1996-2000, 386,000 Λ and 72,000 Λ events have been reconstructed, allowing the measurement of the Λ and Λ polarizations with high statistical accuracy. Averaged over the full kinematic range of the data, the transverse polarizations were measured to be P n Λ = 5.4 ± 0.5 (stat) ± 1.5 (syst) % and P n Λ = -4.0 ± 1.3 (stat) ± 1.2 (syst) %. The dependence of the polarization on several transverse momentum PT and on the hyperons' light cone momentum fraction ζ has been investigated.

Authors:
 [1]
  1. Petersburg Nuclear Physics Inst., Gatchina (Russia); et al.
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
Contributing Org.:
HERMES Collaboration
OSTI Identifier:
1407029
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Acta Physica Polonica. Series B
Additional Journal Information:
Journal Volume: 33; Journal ID: ISSN 0587-4254
Publisher:
Jagiellonian University
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Grebenyuk, O. Transverse polarization of Λ and Λ produced inclusively in eN scattering at HERMES. United States: N. p., 2002. Web.
Grebenyuk, O. Transverse polarization of Λ and Λ produced inclusively in eN scattering at HERMES. United States.
Grebenyuk, O. Fri . "Transverse polarization of Λ and Λ produced inclusively in eN scattering at HERMES". United States. https://www.osti.gov/servlets/purl/1407029.
@article{osti_1407029,
title = {Transverse polarization of Λ and Λ produced inclusively in eN scattering at HERMES},
author = {Grebenyuk, O.},
abstractNote = {The transverse polarization of inclusively produced Λ and Λ-hyperons has been studied at HERMES using the 27.6 GeV positron beam of HERA and an internal gas target. From the data taken in the years 1996-2000, 386,000 Λ and 72,000 Λ events have been reconstructed, allowing the measurement of the Λ and Λ polarizations with high statistical accuracy. Averaged over the full kinematic range of the data, the transverse polarizations were measured to be P n Λ = 5.4 ± 0.5 (stat) ± 1.5 (syst) % and P n Λ = -4.0 ± 1.3 (stat) ± 1.2 (syst) %. The dependence of the polarization on several transverse momentum PT and on the hyperons' light cone momentum fraction ζ has been investigated.},
doi = {},
journal = {Acta Physica Polonica. Series B},
number = ,
volume = 33,
place = {United States},
year = {2002},
month = {11}
}

Journal Article:
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