Observation of Transverse Λ/¯Λ Hyperon Polarization in e+e− Annihilation at Belle

Guan, Y and Vossen, A and Giri, Anjan Kumar and et al, . (2019) Observation of Transverse Λ/¯Λ Hyperon Polarization in e+e− Annihilation at Belle. Physical Review Letters, 122. ISSN 0031-9007

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Abstract

We report the first observation of the spontaneous polarization of Λ and ¯Λ hyperons transverse to the production plane in e+e− annihilation, which is attributed to the effect arising from a polarizing fragmentation function. For inclusive Λ/¯Λ production, we also report results with subtracted feed-down contributions from Σ0 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 Λ/¯Λ hyperon.

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IITH Creators:
IITH CreatorsORCiD
Giri, Anjan KumarUNSPECIFIED
Item Type: Article
Subjects: Physics
Divisions: Department of Physics
Depositing User: Team Library
Date Deposited: 05 Feb 2020 05:08
Last Modified: 05 Feb 2020 05:08
URI: http://raiith.iith.ac.in/id/eprint/7413
Publisher URL: https://doi.org/10.1103/PhysRevLett.122.042001
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