Which Bosonic Loop Corrections are Tested in Electroweak Precision Measurements?

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dc.creatorDittmaier, S.
dc.creatorSchildknecht, D.
dc.creatorWeiglein, G.
dc.date1995-11-09
dc.date.accessioned2026-07-07T03:58:31Z
dc.date.available2026-07-07T03:58:31Z
dc.descriptionThe nature of the electroweak bosonic loop corrections to which current precision experiments are sensitive is explored. The set of effective parameters $\De x$, $\De y$, and $\eps$, which quantify SU(2) violation in an effective Lagrangian, is shown to be particularly useful for this purpose. The standard bosonic corrections are sizable only in the parameter $\De y$, while $\De x$ and $\eps$ are sufficiently well approximated by the pure fermion-loop prediction. By analyzing the contributions to $\De y$ it is shown that the bosonic loop corrections resolved by the present precision data are induced by the change in energy scale between the low-energy process muon decay and the energy scale of the LEP1 observables. If the (theoretical value of the) leptonic width of the W boson is used as input parameter instead of the Fermi constant $\GF$, no further bosonic loop corrections are necessary for compatibility between theory and experiment.
dc.description15 pages, latex, 6 uuencoded postscript figures, talk presented by G. Weiglein at The Second German-Polish Symposium, New Ideas in the Theory of Fundamental Interactions, Zakopane, September 1995
dc.identifierhttps://arxiv.org/abs/hep-ph/9511281
dc.identifierhttp://arxiv.org/abs/hep-ph/9511281
dc.identifierActa Phys.Polon. B27 (1996) 2507-2524
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/45842
dc.subjectHigh Energy Physics - Phenomenology
dc.titleWhich Bosonic Loop Corrections are Tested in Electroweak Precision Measurements?
dc.typetext

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