| 释义 |
Zweig, n. Particle Physics.|tsvaɪg|
The name of George Zweig (b. 1937), Russian-born U.S. physicist, used attrib., in Comb., and in the possessive in or with reference to Zweig('s) rule, an empirical rule governing the possible outcomes of hadron decay in quantum chromodynamics.
1973Physics Rep. VIII. 199 A four point function satisfying the quark model ansatz..splits naturally into two three point functions, each satisfying Zweig's rule. 1977Proc. 17th Scottish Univ. Summer School Physics 192 With the Zweig rule, the ρπ decay mode for the physical ϕ meson is permitted only through its admixture of nonet ω state. Ibid. (caption) Examples of..Zweig-allowed and..Zweig-forbidden graphs for ϕ decay. 1978Nature 9 Mar. 192/1 There is also a useful review by Lipkin of the empirical status of the so-called Zweig rule, which is supposed to inhibit the decay of the J/ψ to hadrons so strongly. 1989F. Close in P. Davies New Physics xiv. 408/1 Any process where new quarks and antiquarks emerge in a way that can be cut, like figure 14.7(b), is suppressed relative to processes of the figure 14.7(a) topology. This observation has been elevated to an ad hoc rule, known as the Zweig rule or OZI rule. |