Word: pion
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Dates: during 1960-1969
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...tour, is hardly the ultimate test of golf. But it does have $50,000 in prize money, and until last week, it enjoyed a certain notoriety as one of the only two major U.S. tournaments that Arnold Palmer has never won (the other: the P.G.A. Three-time Masters cham pion, winner of the U.S. and British Opens and of more money in one year ($81,448 last season) than any other golfer in history, Palmer had played in the tournament seven times, had never finished better than tenth. On the 508-yd., par-5 ninth hole at Los Angeles...
...created by powerful atom smashers) disintegrate into slightly lighter mu mesons (muons) while an unseen particle carries away part of their energy. At first the physicists assumed that ordinary neutrinos were the guilty particles. Then they began to have their doubts. Maybe another kind of neutrino was stealing the pion's energy. But it had been hard enough to trap regular neutrinos; how were scientists to locate and study an even more evasive particle...
...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 10²² (one ten-thousand-billion-billionth) seconds. It travels only one ten-billionth of a centimeter...