See text transcription below, with lower case "upsilon".
It is the equivalent of the phi (strange quark, strange antiquark), psi (charm quark, charm antiquark) and upsilon (bottom quark, bottom antiquark) mesons.
These peaks are associated with subatomic particles (such as nucleons, delta baryons, upsilon mesons) and their excitations.
It uses diaeresis over initial upsilon; two corrections were made.
It uses points, breathing, and accents sparingly; iota and upsilon sometimes have diaeresis.
The initial iota and upsilon have the diaeresis.
