文章基本信息

标题：Transverse Lambda polarization at high energy colliders
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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.