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Mesure du contenu étrange du nucléon : expérience G0

Abstract : The G0 project is a parity violation experiment dedicated to the measurement of the proton weak and axial form factors by means of electron-proton scattering. Combining these weak form factors with the electromagnetic ones makes possible the extraction of the contribution of strange quarks to the charge and magnetization distribution in the nucleon. This thesis presents the strategy used for the G0 experiment, the different subsystems and the first results from its engineering run. The counting rate asymmetries, at the order of 10-5, are measured over a large range in transferred momentum (Q2 =0.1 to 1 (GeV/c)2) with expected precision at the level of 10-7. A deadtime correction program has been developed which allows to correct 90% of the counting losses and to reduce associated false asymmetries at the level of 10-8. A method has been defined to extract the measured values of Q2 with a precision of 1%. The first preliminary results of G0 on parity violation asymmetries are also shown.
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https://tel.archives-ouvertes.fr/tel-00005222
Contributor : Admin Base Des Publications de l'In2p3 <>
Submitted on : Friday, March 5, 2004 - 4:32:03 PM
Last modification on : Thursday, November 19, 2020 - 12:58:48 PM
Long-term archiving on: : Wednesday, September 12, 2012 - 1:55:10 PM

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  • HAL Id : tel-00005222, version 1

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UJF | LPSC | CNRS | IN2P3 | GEPI | UGA

Citation

Guillaume Batigne. Mesure du contenu étrange du nucléon : expérience G0. Physique Nucléaire Théorique [nucl-th]. Université Joseph-Fourier - Grenoble I, 2003. Français. ⟨tel-00005222⟩

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