ηc‧ hadroproduction at next-to-leading order and its relevance to ψ‧ production

We proceed to the first phenomenological study of η_c^‧ prompt hadroproduction at next-to-leading order in α_s. Based on heavy-quark-spin symmetry, which is systematically used in quarkonium-production phenomenology, we demonstrate that prompt η_c^‧ can be studied at the LHC with the existing data. We emphasise its relevance to constrain ψ^‧ production, in the same way as the first prompt η_c data at the LHC lately strongly impacted the phenomenology of J / ψ studies.