Editing Charm quark (section)

==== Other charmed particles (1975–1977) ====
In April 1975, E. G. Cazzoli et al., including Palmer and Samios, published their earlier ambiguous evidence for the charmed baryon.{{sfn|Cazzoli et al.|1975}} By the time of the Lepton–Photon Symposium in August 1975, eight new heavy particles had been discovered.{{sfn|Riordan|1987|pp=[https://archive.org/details/huntingofquarktr00mich/page/310 310–311]}} These particles, however, have zero total charm.{{sfn|Riordan|1987|p=[https://archive.org/details/huntingofquarktr00mich/page/312 312]}} Starting from the fourth quarter of that year, physicists began to look for particles with a net, or "naked", charm.{{sfn|Riordan|1987|p=[https://archive.org/details/huntingofquarktr00mich/page/317 317]}}

On 3 May 1976 at SLAC, [[Gerson Goldhaber]] and François Pierre identified a {{val|1.87|u=GeV/c2}} peak, which suggested the presence of a neutral charmed [[D meson]] according to Glashow's prediction. On 5 May, Goldhaber and Pierre published a joint memorandum about their discovery of the "naked charm".{{sfn|Riordan|1987|p=[https://archive.org/details/huntingofquarktr00mich/page/318 318]}} By the time of the 18th International Conference on High Energy Physics, more charmed particles had been discovered. Riordan said "solid evidence for charm surfaced in session after session" at the conference, confirming the existence of the charm quark.{{sfn|Riordan|1987|loc=p. 319, "Solid evidence for charm surfaced in session after session. There was no longer any doubt"}}{{sfn|Griffiths|2008|loc=p. 47, "With these discoveries, the interpretation&nbsp;... was established beyond reasonable doubt. More important, the quark model itself was put back on its feet"}} The charmed strange meson was discovered in 1977.{{sfn|Brandelik et al.|1977}}{{sfn|Griffiths|2008|p=47}}