![]() ![]() Out of these flavours, up and down quarks are lightest particles and four other heavier particles which tend to convert rapidly to up and down quarks. These six flavours are up and down, top and bottom and charm and strange. The type of quarks is also termed as “flavour” so that there are six flavours of quarks. According to this model, there are six types of quarks and are found in three pairs. In the Gell-Mann’s model, it was shown that all mesons were made of a quark and its antiquark whereas all the baryons were made of three quarks. In 1964, the quark model came to the existence and two physicists, Murray Gell-Mann and George Zweig (both from the United States of America) have proposed it, though George called the particles as “aces”. ![]()
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