| 单词 | phi meson |
| 释义 | > as lemmasphi meson 3. Particle Physics. In full phi meson. Any of a group of neutral mesons which have the same quantum numbers as the omega meson, are observed as resonances, have a mass of 1019 MeV, and on decaying usually produce two kaons or three pions. Frequently written ϕ. ΘΚΠ the world > matter > physics > atomic physics > particle physics > particle participating in strong interaction > meson > [noun] > type of tau1949 photomeson1950 theta1954 eta1961 omega meson1961 rho1961 phi meson1962 bottomonium1976 quarkonium1977 upsilon1977 1962 J. J. Sakurai in Physical Rev. Lett. 9 472/1 In a recent issue of this journal a Brookhaven-Syracuse group reports the possible presence of a narrow resonance (Γ ≈ 20 MeV) in the KK system with mass ≈1020 MeV in the reactions K− + p → K+ + K− + Λ, K0 + K0 + Λ. In discussing the quantum numbers of the resonating KK pair, which we tentatively refer to as the ϕ meson, [etc.]. 1962 J. J. Sakurai in Physical Rev. Lett. 9 474/1 We would like to suggest that this discrepancy is due to mixing between ω and ϕ arising from the fact that the ω and ϕ have the same quantum numbers as far as spin-parity, isospin, and G-parity are concerned. 1971 Sci. Amer. July 100/2 Three vector mesons with zero strangeness are currently known: the rho, the omega and the phi. 1975 Sci. Amer. Oct. 48/2 Zweig's rule was formulated to explain the decay of the phi meson, which is made up of a strange quark and a strange antiquark and has a mass of about 1 GeV. 1996 Physics Lett. B. 388 141 For phi mesons, changes in their properties are of interest because they would affect the production rate in high energy nucleus-nucleus collisions. < as lemmas |
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