GLOBAL CHI(2) ANALYSIS OF ELECTROWEAK DATA IN SO(10) SUSY GUTS

We present the details of a global chi(2) analysis of electroweak data , including fermion masses and mixing angles, in SO(10) SUSY GUTs. Jus t as precision electroweak data are used to test the standard model, t he well-determined standard model parameters are the precision electro weak data for testing theories beyond the standard model. In this pape r we use the latest experimentally measured values for these parameter s. We study several models discussed in the literature. One of these m odels provides an excellent fit to the low energy data with chi(2) sim ilar to 1 for three degrees of freedom. We present graphs of constant chi(2) contours as functions of position in soft SUSY-breaking paramet er space, as well as our predictions for a few selected points in para meter space. We also study the sensitivity of our results to changes i n various parameters. Finally, we discuss the consequences of our work in the context of a general MSSM analysis at the Z scale. [S0556-2821 (97)07023-9].