Additional Fermion Families and Precision Electroweak Data

Details Additional Fermion Families and Precision Electroweak Data Additional Fermion Families and Precision Electroweak Data

1994-08-17

arxiv.org/abs/hep-ph/9408308v1

Phys.Lett. B340 (1994) 81-85

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages + 4 appended ps diags, SWAT-40

Scientific paper

10.1016/0370-2693(94)91301-3

The S,T, and U formalism for studying electroweak precision data has recently been updated to include the effects of new light physics and within this analysis the latest LEP and SLC data tightly constrain models of physics beyond the Standard Model. We re-examine the constraints on additional strong and weakly interacting fermion families in the light of these developments. We conclude that the precision data favour models with at least one fermion with a mass below 150GeV.

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