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Professor Martin Perl

Professor Martin Perl

H416/0022

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Credit

DAVID PARKER / SCIENCE PHOTO LIBRARY DAVID PARKER / SCIENCE PHOTO LIBRARY

Caption

Professor Martin Perl, US particle physicist at the Stanford Linear Accelerator Center (SLAC) in Stanford, California. Perl was a member of the team headed by Burton Richter which co-discovered the J/psi particle - the first evidence of the charm quark - at the SPEAR electron-positron collider at SLAC in 1974. In the same year, Perl used the same detector at SPEAR - the Mark 1 - to discover the tau lepton particle, the heavy relative of the electron & muon; this was the first hint of a third generation of leptons & quarks.

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