When using this data, please cite the original publication:

Additionally, you should cite the record:

@misc{hepdata.29804, author = "{OMICRON Collaboration}", title = "{Measurement of $\pi^- p \to \pi^- p \pi^0$ Reaction Near Threshold and Breaking of Chiral Symmetry}", howpublished = "{HEPData (collection)}", year = 1989, note = "\url{https://doi.org/10.17182/hepdata.29804}" }

or, if you prefer, a specific version of the record:

@misc{hepdata.29804.v1, author = "{OMICRON Collaboration}", title = "{Measurement of $\pi^- p \to \pi^- p \pi^0$ Reaction Near Threshold and Breaking of Chiral Symmetry (Version 1)}", howpublished = "{HEPData (collection)}", year = 1989, note = "\url{https://doi.org/10.17182/hepdata.29804.v1}" }

You can also cite this table directly.

@misc{hepdata.29804.v1/t1, author = "{OMICRON Collaboration}", title = "{``Table 1'' of ``Measurement of $\pi^- p \to \pi^- p \pi^0$ Reaction Near Threshold and Breaking of Chiral Symmetry'' (Version 1)}", howpublished = "{HEPData (dataset)}", year = 1989, note = "\url{https://doi.org/10.17182/hepdata.29804.v1/t1}" }