High precision tests of QED and physics beyondthe standard model
Escribano, Rafel (Institut de Física d'Altes Energies)
Massó i Soler, Eduard 1954- (Universitat Autònoma de Barcelona. Departament de Física)

Date:	1998
Description:	12 pàg.
Abstract:	We study the four most significant high precision observables of QED - the anomalous electron and muon magnetic moments, the hydrogen Lamb shift and muonium hyperfine splitting - in the context of gauge-invariant effective Lagrangians. The agreement between the theoretical predictions for these observables and the experimental data places bounds on the lowest dimension operators of the effective Lagrangians. We also place bounds on such effective operators using other experimental data. Comparison of the two types of bounds allows us to discuss the potential of each one of the four high precision observables in the search for physics beyond the Standard Model. We find that the anomalous electron and muon magnetic moments are sensitive to new physics while the hydrogen Lamb shift and muonium hyperfine splitting are not.
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Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	Hydrogen ; Experimental Data ; High Precision ; Theoretical Prediction ; Dimension Operator
Published in:	The European Physical Journal. C, Particles and Fields, Vol. 4, (1998) , p. 139-143, ISSN 1434-6052

DOI: 10.1007/PL00021656

Postprint 13 p, 271.0 KB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Institut de Física d’Altes Energies (IFAE)
Articles > Research articles
Articles > Published articles