| 单词 | baryon number |
| 释义 | > as lemmasbaryon number baryon number n. a quantum number assigned to subatomic particles, equal to 1 for baryons and −1 for antibaryons (hence 1/ 3 for quarks and -1/ 3 for antiquarks), and 0 for all other particles; symbol B.The concept is generalized for a collection of particles, being defined as one third of the difference between the number of quarks and the number of antiquarks.Baryon number is conserved in nearly all the particle interactions hitherto observed. ΚΠ 1956 Nucl. Physics 1 658 The conservation of parity, baryon number, and charge cannot decide whether a given process is strong or weak (except for elementary processes), and we need a conservation of U. 1972 G. L. Wick Elem. Particles v. 92 All of the strongly interacting particles fall into families which are specified by three quantum numbers—hypercharge, isotopic spin and baryon number. 1988 J. D. Barrow & F. J. Tipler Anthropic Cosmol. Princ. (rev. ed.) v. 357 The strong interaction governs a class of particles (quarks and gluons) which possess a conserved quality called baryon number. 2004 A. Watson Quantum Quark iv. 144 Baryon number conservation, on one hand an empirical rule, is also inspired by quantum field theory. < as lemmas |
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