Experimental Evidence for Electroweak Corrections Beyond Fermion Loops

Details Experimental Evidence for Electroweak Corrections Beyond Fermion Loops Experimental Evidence for Electroweak Corrections Beyond Fermion Loops

1994-05-11

arxiv.org/abs/hep-ph/9405266v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

Presented at the XXIXth Rencontres de Moriond, March 1994., 4pages uuencoded postscript file, BI-TP 94/18

Scientific paper

We reemphasize the importance of discriminating fermion-loop and bosonic electroweak corrections in the analysis of electroweak precision data. Most recent data are indeed precise enough to require corrections beyond (trivial) fermion loops. An analysis of these data in terms of the observables $\Delta x \equiv \epsilon_{N1} - \epsilon_{N2}$, $\Delta y \equiv - \epsilon_{N2}$ and $\epsilon \equiv - \epsilon_{N3}$ identifies the required additional corrections as vertex corrections at the $W^\pm f\bar f^\prime$ and $Z^0 f\bar f$ vertices. Standard-model values for these corrections are consistent with the experimental data.

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