Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1996-09-11
Physics
High Energy Physics
High Energy Physics - Phenomenology
4 pp, 4 figures, uses psfig.tex and stwol.sty; invited talk given at ICHEP `96 meeting, 25-31 July 1996, Warsaw, Poland
Scientific paper
I summarize work done with Bamert, Burgess, Nardi and London in which we examine the effects of new physics on R_b. Our work facilitates the identification of such new physics in case the present two-sigma deviation of R_b from its Standard Model value should persist, or alternatively it helps to constrain new physics in case the discrepancy continues to disappear. We consider two general classes of effects: mixing of the b or t quarks with heavy, exotic quarks, and loop corrections to the $Zb\bar b$ vertex. Our aim was to give an analysis which is as exhaustive and as model-independent as possible.
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