Evaluation of S, T, U parameters, triple gauge boson vertices and some oblique corrections in extra U(1) superstring inspired model

Explicit evaluation of the following parameters has been carried out in the extra U(1) superstring inspired model: (i) As M-Z2 varies from 555 GeV to 620 GeV and (m(t))(CDF) = 175.6 +/- 5.7 GeV (Table 1). (a) S-New varies from -0.100 +/- 0.089 to -0.130 +/- 0.090, (b) T-New varie s from -0.098 +/- 0.097 to -0.129 +/- 0.098, (c) U-New varies from -0.229 /- 0.177 to -0.253 +/- 0.206, (d) tau(z) varies from 2.487 +/- 0.027 to 2.4 86 +/- 0.027, (e) A(LR) varies from 0.0125 +/- 0.0003 to 0.0126 +/- 0.0003. (f) A(FB)(b) remains constant at 0.0080 +/- 0.0007. Almost identical values are obtained for (m(t))(D0) = 169 GeV (see table 2) . (ii) Triple gauge boson vertices (TGV) contributions : As M-Z2 varies fro m 555 GeV to 620 GeV and (m(t))(CDF) = 175.6 +/- 5.7 GeV. (a) root s = 500 GeV, asymptotic case : (f) over bar(1)(Z1) varies from -0. 301 to -0.179; (f) over bar(3)(Z1) varies from -0.622 to -0.379; f(5)(Z1) v aries from +0.0061 to 0.0056; (f) over bar(3\Z1)(gamma) varies from -3.691 to -2.186. (f) over bar(1)(Z2) varies from +0.270 to +0.118; (f) over bar(3 )(Z2) varies from +0.552 to 0.238; f(5)(Z2) varies from +0.0004 to +0.0002; (f) over bar(3\Z2)(gamma) remains constant at -0.110. (b) root 3 = 700 GeV , asymptotic case: (f) over bar(i)(Z1) varies from -0.297 to -0.176; (f) ov er bar(3)(Z1) varies from -0.609 to -0.370; f(5)(Z1) varies from -0.0082 to -0.0078; (f) over bar(3\Z1)(gamma) varies from -3.680 to -2.171. root s = 700 GeV, nonasymptotic case: (f) over bar(1)(Z2) varies from -0.173 to -0.2 99; (f) over bar(3)(Z2) varies from -0.343 to -0.591; f(5)(Z2) varies from -0.005 to -0.011; (f) over bar(3\Z2)(gamma) remains constant at -0.110. The pattern of form factors values for root s = 1000, 1200 GeV is almost id entical to that of root s = 700 GeV. Further the values of the form factors for (m(t))(DG) (=169 GaV) follow identical pattern as that of (m(t))(CDF) form factors values (see tables 5, 6, 9, 10). We conclude that the values of all the form factors with the exception of t hese of f(5)(Z1), f(5)(Z2) are comparable or larger than the S,T values and therefore the TGV contributions are important while deciding the use of ex tra U(1) model for doing physics beyond standard model.