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  • 标题:Transverse Lambda polarization at high energy colliders
  • 本地全文:下载
  • 作者:D. Boer
  • 期刊名称:PoS - Proceedings of Science
  • 印刷版ISSN:1824-8039
  • 出版年度:2010
  • 卷号:2010
  • 出版社:SISSA, Scuola Internazionale Superiore di Studi Avanzati
  • 摘要:Measurements of transverse polarization of L hyperons produced in high energy p p collisions may help to address several open issues about L production and polarization mechanisms, such as the amount of SU(3) breaking, the importance of gluons and sea quarks, and the origin of spontaneous L polarization. The process p+ p → L↑ +jet+X at midrapidity is ideally suited for this purpose, for instance at LHC’s ALICE experiment. New expressions and predictions are presented for the transverse L polarization in this process, within a factorized description which involves transverse momentum and spin dependence in the fragmentation process. Uncertainties from the unpolarized L fragmentation functions, due to the unknown magnitude of SU(3) breaking and the apparent inconsistency between pp and e+e− data, are investigated.
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