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Low-Energy Antiproton Programme at PS: History, Experiments, and Discoveries

Explore the legacy of the Low Energy Antiproton Programme at the PS facility, focusing on its operation from 1990-1996, test of symmetries in the Kaon system, and key experiments conducted. Learn about the deceleration and storage of antiprotons at the Low Energy Antiproton Ring (LEAR) from 1982 to 1996, revealing insights into particle interactions. Discover the measured rates for K0 and anti-K0 with a clear sign of symmetry violation between particles and antiparticles.

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Low-Energy Antiproton Programme at PS: History, Experiments, and Discoveries

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  1. Low-Energy Antiproton Programme @ PS • The Low Energy Antiproton Ring decelerated and stored antiprotons. It was built in 1982 and operated until 1996. LEAR was able to deliver ~106 anti-protons per second onto fix targets. • 1990 - 1996 • Test of discrete symmetries in the neutral Kaon system • Measured rates for K0 and anti-K0 as function of decay time show a clear sign of symmetry violation between particles and antiparticles LEAR Experiments The experiments at the Low Energy Accelerator Ring (LEAR) CPLEAR Asterix Crystal Barrel K0 → π+π─ K0 → π+π─

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