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Erlangen 2001 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 2: Elektromagnetische und hadronische Proben I

HK 2.1: Gruppenbericht

Montag, 19. März 2001, 16:30–17:00, A

Electron Scattering with Polarized Targets at TESLA — •Frank Ellinghaus — DESY Zeuthen, Platanenallee 6, 15738 Zeuthen, Germany

Measurements of polarized electron-nucleon scattering can be realized at the TESLA linear collider facility with projected luminosities that are about two orders of magnitude higher than those expected of other experiments at comparable energies. Longitudinally polarized electrons, accelerated as a small fraction of the total current in the e+ arm of TESLA, can be directed onto a solid state target that may be longitudinally or transversely polarized. A large variety of polarized parton distribution and fragmentation functions can be determined with unprecedented accuracy, many of them for the first time. A main goal of the experiment is the precise measurement of the x- and Q2-dependence of the unknown quark transversity distributions that will provide us with the full information on the nucleon’s quark spin structure as relevant for high energy processes. The additional possibilities of using unpolarized targets and of experiments with a real photon beam turn TESLA-N into a versatile next-generation facility at the intersection of particle and nuclear physics.

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