https://doi.org/10.1140/epja/s10050-021-00626-1
Regular Article - Theoretical Physics
Baryon decays 
within the QCD factorisation framework
Physik-Department, Technische Universität München, James-Franck-Str. 1, 85748, Garching, Germany
Received:
4
October
2021
Accepted:
4
November
2021
Published online:
11
February
2022
We investigate 
decays into octet baryon–antibaryons pairs. The decay amplitudes are computed within the collinear QCD factorisation framework. The subleading amplitude, which describes the decay of longitudinally polarised charmonium, is computed using twist-4 three-quark distribution amplitudes. The obtained results are used for a qualitative analysis of the experimental data. It is found that the polarisation parameter 
can be described with an accuracy 10–30%, which may indicate that the pQCD contribution dominates this observable.
© The Author(s) 2022
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
