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Observation of Transverse Lambda/(Lambda)over-bar Hyperon Polarization in e(+)e(-) Annihilation at Belle

Title
Observation of Transverse Lambda/(Lambda)over-bar Hyperon Polarization in e(+)e(-) Annihilation at Belle
Author
천병구
Keywords
FINAL-STATE INTERACTIONS; SPIN ASYMMETRIES; LAMBDA; GAUGE
Issue Date
2019-01
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW LETTERS, v. 122, NO 4, no. 042001
Abstract
We report the first observation of the spontaneous polarization of Lambda and (Lambda) over bar hyperons transverse to the production plane in e(+)e(-) annihilation, which is attributed to the effect arising from a polarizing fragmentation function. For inclusive Lambda/(Lambda) over bar production, we also report results with subtracted feed-down contributions from Sigma(0) and charm. This measurement uses a dataset of 800.4 fb(-1) collected by the Belle experiment at or near a center-of-mass energy of 10.58 GeV. We observe a significant polarization that rises with the fractional energy carried by the Lambda/(Lambda) over bar hyperon.
URI
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.122.042001https://repository.hanyang.ac.kr/handle/20.500.11754/122136
ISSN
0031-9007; 1079-7114
DOI
10.1103/PhysRevLett.122.042001
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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