Don't know why you're downvoted, this is exactly what they're asking for. You don't have to explain the details of the J/ψ meson, just the first time you write

Don't know why you're downvoted, this is exactly what they're asking for. You don't have to explain the details of the J/ψ meson, just the first time you write it in the article put "J/ψ meson (J/Psi meson) For the qubit example, they're not asking for the article to always describe what a qubit is, just if you're going to only write it as "α|0⟩ + β|1⟩" it would be helpful to put (qubit quantum state) the first time you do so in the article.