| Popis: |
Since the discovery of the D meson at SPEAR in 1976, our experimental knowledge about charmed particles has progressed rather quickly. In particular, during the last year, the existence of the lowest-mass charmed baryon, the ∧c, has been ascertained, and an asymmetry between the decay properties of the D+ and D0 members of the D doublet has been convincingly demonstrated. These results, unlike most of the previous ones on the D mesons, are not due uniquely to e+e− storage rings, but also to experiments using other production processes (neutrino, hadron, or photon interactions) and a variety of classical, revived, or new techniques often in combination (spectrometers, big bubble chambers, emulsions, small high-resolution bubble chambers). Other promising methods for charm detection are being studied (solid-state detectors, high-pressure streamer chamber, holographic photography of bubbles). |
