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À la recherche de nouvelles forces avec l’hélium 3 polarisé

Abstract : The exploration of fundamental interactions between subatomic particles ledto the particle physics Standard Model which remains unchallenged by any lab experiment.However, some serious theoretical and cosmological clues reveal shortcomings inthe Standard Model and deviations are expected. This new physics is searched for at largecolliders with energies of the order of the electroweak scale and beyond. With a differentphilosophy, one can expect the new physics to show up at very low energy using atypicalexperimental techniques. This thesis deals with short-range spin-dependent new forceswhich are at the heart of the low energy precision physics. A hyperpolarized helium 3 gaswas used as a probe of this new sub-mm interaction. This manuscript present the bestexclusion limit on the strength of a scalar-pseudoscalar coupling gsgp for ranges between1 μm and 100 μm, which correspond to sub-eV masses.
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Submitted on : Monday, October 12, 2015 - 4:52:18 PM
Last modification on : Wednesday, November 24, 2021 - 11:42:04 AM
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  • HAL Id : tel-01214643, version 1

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Mathieu Guigue. À la recherche de nouvelles forces avec l’hélium 3 polarisé. Physique des Hautes Energies - Expérience [hep-ex]. Université Grenoble Alpes, 2015. Français. ⟨NNT : 2015GREAY026⟩. ⟨tel-01214643⟩

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