F meson

F meson

[′ef ‚mā‚sän]
(particle physics)
Former name of charged meson that carries both strangeness and charm and has a mass of approximately 1.97 GeV, spin 0, and negative parity; now known as Ds meson.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.