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No quark parts

发布时间:2019-02-27 10:17:04来源:未知点击:

QUARKS may be fundamental particles after all. In February last year, a team of researchers at Fermilab near Chicago announced tantalising hints that quarks might be made up of smaller particles (New Scientist, Science, 17 February 1996, p 17). But after a closer look at their data, they now say that quarks are fundamental particles—as far as they can tell. The Fermilab team counted the jets of debris flung out from collisions between protons and antiprotons. At the highest energies, they noticed unexpectedly large numbers of jets. One possible explanation for this is that quarks contain a family of smaller particles. However, the directions of the jets, which the researchers have now looked at in detail,