Word: antiproton
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Dates: during 1960-1969
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...week a team of Columbia University researchers dispelled the doubts. In the Physical Review Letters, the Columbia scientists reported that they have produced the first complex nucleus of antimatter ever observed-the anti-deuteron. It is the antimatter counterpart to the nucleus of deuterium (heavy hydrogen), consists of an antiproton and antineutron bound by a strong nuclear force, and has a negative charge. Such an achievement, the Columbia researchers conclude, provides strong evidence to support theories about the existence of an antiworld of stars, planets, and possibly even antipeople...
...Professor Arthur H. Rosenfeld fed the cards into a digital computer set up to search for stars that suggested the presence of an invisible intermediate particle. Only 93 of the 2,500 stars showed the computer what it was looking for. Carefully reexamined, the stars proved that when an antiproton hits a proton, it sometimes creates five mesons-two positive pions, two negative pions and one pion with no charge at all. For a fleeting instant, one positive and one negative pion cling to the uncharged pion, forming a single unit. That unit lives for only...
...world of the physicist can be an eerie one?and that is part of its fascination. In the field of high-energy physics, few are involved in more eerie or more fascinating work than Berkeley's Italian-born Emilio Segrč, who discovered the antiproton, which turns into a flash of energy when it hits an ordinary proton...