Because of the nearly simultaneous discovery, the J/ψ is the only particle to have a two-letter name. Richter named it "SP", after the SPEAR accelerator used at SLAC ; however, none of his coworkers liked that name. After consulting with Greek-born Leo Resvanis to see which Greek letters were still available, and rejecting " iota " because its name implies insignificance, Richter chose "psi" – a name which, as Gerson Goldhaber pointed out, contains the original name "SP", but in reverse order. Coincidentally, later spark chamber pictures often resembled the psi shape. Ting assigned the name "J" to it, which is one letter away from " K ", the name of the already-known strange meson; another reason is that "j" is the symbol for electromagnetic current. Possibly by coincidence, "J" strongly resembles the Chinese character for Ting's name (丁 Dīng). J is also the first letter of Ting's eldest daughter's name, Jeanne.