rishonn.

Brit.

/ˈrɪʃɒn/, U.S.

/ˈriʃɑn/

Origin: A borrowing from Hebrew. Etymon: Hebrew ri'šōn.

Etymology: < Hebrew ri'šōn first, primary (compare quot. 1979); compare -on suffix¹. So called as being conceived as more fundamental than the conventionally conceived fundamental particles, quarks and leptons.

Particle Physics.

In a particular model of particle physics: a hypothetical particle postulated as a constituent of quarks and leptons. Cf. preon n.Rishons are conceived as occurring in two kinds, T and V. Different combinations of these form different particles, e.g. TTT a positron and TTV one of the up quarks.

ΘΚΠ

the world > matter > physics > atomic physics > particle physics > quark > [noun] > hypothetical constituent of

rishon1979

1979 H. Harari in Physics Lett. B. 86 84/2 The most economical set of building blocks consists of two J = 1/2 objects: one charged (Q = 1/3) and one neutral... We denote the charged particle by T and the neutral one by V. We name these particles ‘rishons’. [Note] ‘Rishon’ means first, primary (in Hebrew).

1999 S. M. Phillips ESP Quarks & Superstrings vi. 235 Preon models like Harari's rishon model predicts [sic] that electrons are bound states of more fundamental particles.

2006 F. Smarandache et al. Unfolding Labyrinth i. 10 Could we find a theoretical explanation of quarks / rishons from the viewpoint of multivalued-logic Quantum Mechanics?

This entry has been updated (OED Third Edition, June 2010; most recently modified version published online March 2022).

单词	rishon
释义	rishonn. Brit. /ˈrɪʃɒn/, U.S. /ˈriʃɑn/ Origin: A borrowing from Hebrew. Etymon: Hebrew ri'šōn. Etymology: < Hebrew ri'šōn first, primary (compare quot. 1979); compare -on suffix¹. So called as being conceived as more fundamental than the conventionally conceived fundamental particles, quarks and leptons. Particle Physics. In a particular model of particle physics: a hypothetical particle postulated as a constituent of quarks and leptons. Cf. preon n.Rishons are conceived as occurring in two kinds, T and V. Different combinations of these form different particles, e.g. TTT a positron and TTV one of the up quarks. ΘΚΠ the world > matter > physics > atomic physics > particle physics > quark > [noun] > hypothetical constituent of rishon1979 1979 H. Harari in Physics Lett. B. 86 84/2 The most economical set of building blocks consists of two J = 1/2 objects: one charged (Q = 1/3) and one neutral... We denote the charged particle by T and the neutral one by V. We name these particles ‘rishons’. [Note] ‘Rishon’ means first, primary (in Hebrew). 1999 S. M. Phillips ESP Quarks & Superstrings vi. 235 Preon models like Harari's rishon model predicts [sic] that electrons are bound states of more fundamental particles. 2006 F. Smarandache et al. Unfolding Labyrinth i. 10 Could we find a theoretical explanation of quarks / rishons from the viewpoint of multivalued-logic Quantum Mechanics? This entry has been updated (OED Third Edition, June 2010; most recently modified version published online March 2022). < n.1979
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