Scientists are very calm and equillibrated persons. Only sometimes they get very excited – in particular
when they discover an elementary particle.
This was the case of “charmonium”. the meson made of cc quarks. the first evidence of the fourth
quark completing the second family (that of strange quark)..
Charmonium is a meson composed of charm quark and antiquark. This is quite an exception in mesons family - mesons like to be composed from mixed quarks: meson π (that of nuclear forces) of u and d (or vice versa), K-mesons (those of CP symmetry breaking) of s and d, B-mesons (those from “BaBar” and “Belle” experiments) of b and u.
The energy (mass) spectrum of the cc meson is really rich.
Two months is more or less the (quickest) time for answering a (scientific) letter.
An than the story goes on, until the next (experimental and/or theoretical) shot…
The fourth quark was discovered in 1974. but the theory (M. Kobayashi and T. Masakawa) in the same year predicted next two…
Charmonium is a meson composed of charm quark and antiquark. This is quite an exception in mesons family - mesons like to be composed from mixed quarks: meson π (that of nuclear forces) of u and d (or vice versa), K-mesons (those of CP symmetry breaking) of s and d, B-mesons (those from “BaBar” and “Belle” experiments) of b and u.
The energy (mass) spectrum of the cc meson is really rich.