First proton-antiproton collision in the SPS

10 July 1981

Carlo Rubbia delays his departure to the Lisbon High Energy Physics Conference by a day so that on 10 July 1981, he is able to announce that the UA1 detector has seen its first proton-antiproton collisions. UA2 takes its first data in December this same year.

Timeline: 
The search for the W boson

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