| 单词 | v-events |
| 释义 | > as lemmasV-events 5. Particle Physics. V is used to designate the heavy unstable particles that produce characteristic V-shaped tracks when they decay ( V-events) now identified as hyperons and kaons. Obsolete exc. historical. ΘΚΠ the world > matter > physics > atomic physics > particle physics > particle participating in strong interaction > meson > [noun] > kaon K-particle1949 V1950 K meson1954 kaon1958 the world > matter > physics > atomic physics > particle physics > particle participating in strong interaction > baryon > [noun] > hyperon V1950 hyperon1953 omega1953 1950 P. M. S. Blackett Let. 12 July (MS.) We have been discussing here the question of nomenclature and I would like to ask your views about the following suggestion. This is that we should call the special type of track that you and we have observed v-tracks and the particle or particles which make them v-particles. The advantage of this seems to be that the letter v is reasonably unallocated and that the name has strong mnemonic values as, in fact, the tracks are v shaped. 1951 Nature 31 Mar. 503/1 Six charged V-tracks are due to the decay of new unstable particles. 1951 Nature 31 Mar. 503/2 Two schemes are suggested to explain the photographs: Vo → p+ + π−..; Vo → π+ + π−. 1952 Sci. Amer. Jan. 26/2 The V-particles appear to be somewhat more massive than a proton or neutron, because in some instances a proton is a decay product. 1968 M. S. Livingston Particle Physics v. 98 If an incident neutral particle has an interaction leading to two charged particles, the vertex of the V event shows the location, and the balance of transverse momenta identifies the incoming direction of the neutral particle. 1974 H. Frauenfelder & E. M. Henley Subatomic Physics vii. 170 By about 1952, many V events had been seen, and a mystery had developed: the V particles were produced copiously but decayed very slowly. < as lemmas |
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