Neutrinos and nucleon structure
作者:
D.H. Perkins,
期刊:
Contemporary Physics
(Taylor Available online 1975)
卷期:
Volume 16,
issue 2
页码: 173-205
ISSN:0010-7514
年代: 1975
DOI:10.1080/00107517508211093
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
‘Deep inelastic’ collisions of neutrinos and antineutrinos with nucleons behave as if the nucleon Was composed of pointlike constituents (partons and antipartons). Neutrino experiments can measure the net number of (partons-antipartons), their angular momentum and mean square charge; they are 3 in number, have spin 9 and possess the fractional charges postulated ten years ago for the fundamental quarks, by Gell-Mann and Zweig. However, the observation of neutral as well as charged currents in neutrino reactions has compelled introduction of further quantum numbers; for example, a fourth quark with ‘charm’. Recent electron-positron collision experiments also suggest new degrees of freedom—‘charm’ and/or ‘colour’. The effects of these and other modifications to the quark model on neutrino cross-sections are discussed.
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