Abstract
We report the first observation of the spontaneous polarization of and hyperons transverse to the production plane in annihilation, which is attributed to the effect arising from a polarizing fragmentation function. For inclusive production, we also report results with subtracted feed-down contributions from and charm. This measurement uses a dataset of 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 hyperon.
- Received 15 August 2018
- Revised 21 December 2018
DOI:https://doi.org/10.1103/PhysRevLett.122.042001
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
Published by the American Physical Society