dorsal/arxiv
View SchemaAtomic Parity Violation : Principles, Recent Results, Present Motivations
| Authors | Jocelyne Guéna, Michel Lintz, Marie-Anne Bouchiat |
|---|---|
| Categories | |
| ArXiv ID | physics/0503143 |
| URL | https://arxiv.org/abs/physics/0503143 |
| DOI | 10.1142/S0217732305016853 |
| Journal | Mod.Phys.Lett. A20 (2005) 375-390 |
Abstract
We review the progress made in the determination of the weak charge, Q\_w, of the cesium nucleus which raises the status of Atomic Parity Violation measurements to that of a precision electroweak test. Not only is it necessary to have a precision measurement of the electroweak asymmetry in the highly forbidden 6S-7S transition, but one also needs a precise calibration procedure. The 1999 precision measurement by the Boulder group implied a 2.5 sigma deviation of Q\_w from the theoretical prediction. This triggered many particle physicist suggestions as well as examination by atomic theoretical physicists of several sources of corrections. After about three years the disagreement was removed without appealing to "New Physics". Concurrently, an original experimental approach was developed in our group for more than a decade. It is based on detection by stimulated emission with amplification of the left- right asymmetry. We present our decisive, recent progress together with our latest results. We emphasize the important impact for electroweak theory, of future measurements in cesium possibly pushed to the 0.1% level. Other possible approaches are currently explored in several atoms.
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"abstract": "We review the progress made in the determination of the weak charge, Q\\_w, of\nthe cesium nucleus which raises the status of Atomic Parity Violation\nmeasurements to that of a precision electroweak test. Not only is it necessary\nto have a precision measurement of the electroweak asymmetry in the highly\nforbidden 6S-7S transition, but one also needs a precise calibration procedure.\nThe 1999 precision measurement by the Boulder group implied a 2.5 sigma\ndeviation of Q\\_w from the theoretical prediction. This triggered many particle\nphysicist suggestions as well as examination by atomic theoretical physicists\nof several sources of corrections. After about three years the disagreement was\nremoved without appealing to \"New Physics\". Concurrently, an original\nexperimental approach was developed in our group for more than a decade. It is\nbased on detection by stimulated emission with amplification of the left- right\nasymmetry. We present our decisive, recent progress together with our latest\nresults. We emphasize the important impact for electroweak theory, of future\nmeasurements in cesium possibly pushed to the 0.1% level. Other possible\napproaches are currently explored in several atoms.",
"arxiv_id": "physics/0503143",
"authors": [
"Jocelyne Gu\u00e9na",
"Michel Lintz",
"Marie-Anne Bouchiat"
],
"categories": [
"physics.atom-ph",
"physics.gen-ph"
],
"doi": "10.1142/S0217732305016853",
"journal_ref": "Mod.Phys.Lett. A20 (2005) 375-390",
"title": "Atomic Parity Violation : Principles, Recent Results, Present Motivations",
"url": "https://arxiv.org/abs/physics/0503143"
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