When using this data, please cite the original publication:

Additionally, you should cite the record:

@misc{hepdata.166008, author = "{CMS Collaboration}", title = "{Measurement of the ratio of the B$_\mathrm{c}^+$$\to$ J/$ψ$$τ^+ν_τ$ and B$_\mathrm{c}^+$$\to$ J/$ψ$$μ^+ν_μ$ branching fractions using three-prong $τ$ lepton decays}", howpublished = "{HEPData (collection)}", year = 2025, note = "\url{https://doi.org/10.17182/hepdata.166008}" }

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

@misc{hepdata.166008.v1, author = "{CMS Collaboration}", title = "{Measurement of the ratio of the B$_\mathrm{c}^+$$\to$ J/$ψ$$τ^+ν_τ$ and B$_\mathrm{c}^+$$\to$ J/$ψ$$μ^+ν_μ$ branching fractions using three-prong $τ$ lepton decays (Version 1)}", howpublished = "{HEPData (collection)}", year = 2025, note = "\url{https://doi.org/10.17182/hepdata.166008.v1}" }

You can also cite this table directly.

@misc{hepdata.166008.v1/t1, author = "{CMS Collaboration}", title = "{``R(J/psi) ratio of branching fractions'' of ``Measurement of the ratio of the B$_\mathrm{c}^+$$\to$ J/$ψ$$τ^+ν_τ$ and B$_\mathrm{c}^+$$\to$ J/$ψ$$μ^+ν_μ$ branching fractions using three-prong $τ$ lepton decays'' (Version 1)}", howpublished = "{HEPData (dataset)}", year = 2025, note = "\url{https://doi.org/10.17182/hepdata.166008.v1/t1}" }