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Accelerator Aspects of the Precision Mass Measurement Experiments at the VEPP-4M Collider with the KEDR Detector
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electron, collider, resonance, positron |
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- S. A. Nikitin
BINP SB RAS, Novosibirsk
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One of most important constituents of the mass measurement experiments at colliders is a precision absolute beam energy calibration. Two methods for particle energy measurement are realized at the electron-positron collider VEPP-4M: one based on the resonant depolarization technique and another using the Back Compton Scattering. KEDR detector measurements of the J/Psi-, Psi' – mesons and the tau-lepton masses performed with the help of these methods is better in accuracy now in the world. Peculiarities of the beam energy calibraton as well as of the mass measurement experiments are represented in the viewpoint of requirements on beam parameters and accelerator systems.
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