In the extra U(1) superstring inspired model, we examine the electroweak and) 1 (′ U symmetry bre... more In the extra U(1) superstring inspired model, we examine the electroweak and) 1 (′ U symmetry breaking with the singlet and exotic quark D , c D along with the study of heavy Z ′ boson in accordance with the top quark mass region. For this, we have done the analysis of complete renormalization group equations (RGEs) pertaining to the anomaly free 6
In the extra U(1) superstring inspired model, we examine the electroweak and U(1)-prime symmetry ... more In the extra U(1) superstring inspired model, we examine the electroweak and U(1)-prime symmetry breaking with the singlet and exotic quark D, D+{\c}along with the study of heavy Z-prime boson in accordance with the top quark mass region. For this, we have done the analysis of complete renormalization group equations (RGEs)pertaining to the anomaly free E-{\6}-Eta model of rank 5. The Z-prime is found to the order of TeV or above with allowed small Z-Zprime mixing angle, for which the large singlet VEV is required. This is done by considering the only non-universality of Yukawa couplings at GUT scale because these do not obey the E-{\6}relationship and also satisfies the unitarity constraints both at GUT and weak scale, where rest of the parameters, i.e., gaugino masses, tri-linear couplings, and soft supersymmetric breaking masses are kept universal at GUT scale with the gauge couplings unification. The large value of Yukawa couplings (order of 1) triggered the symmetry breaking ra...
Explicit evaluation of the following parameters has been carried out in the extra U(1) superstrin... more Explicit evaluation of the following parameters has been carried out in the extra U(1) superstring inspired model: (i) As Mz2 varies from 555 GeV to 620 GeV and (rnt)CD~ = 175.6 + 5.7 GeV (Table ): (a) S New varies from -0.100 4-0.089 to -0.130 4-0.090, (b) T New varies from -0.098 4-0.097 to -0.129 4-0.098, (c) U New varies from -0.229 4-0.177 to -0.253 4-0.206, (d) r z varies from 2.487 q-0.027 to 2.486 4-0.027, (e) ALrt varies from 0.0125 4-0.0003 to 0.0126 4-0.0003, (f) AbB remains constant at 0.0080 + 0.0007. Almost identical values are obtained for (mr)Do = 169 GeV (see table ). (ii) Triple gauge boson vertices (TGV) contributions : As Mz2 varies from 555 GeV to 620 GeV and (mt)CDF = 175.6 -I-5.7 GeV. (a) ~ = 500 GeV, asymptotic case : fl zl varies from -0.301 to -0.179; fzl varies from -0.622 to -0.379; fzl varies from +0.0061 to 0.0056; ]glzt varies from -3.691 to -2.186. fz2 varies from +0.270 to +0.118; fz2 varies from +0.552 to 0.238; fz2 varies from +0.0004 to +0.0002; .f~z2 remains constant at -0.110. (b) ~ = 700 GeV, asymptotic case: ]zl varies from -0.297 to -0.176; ]zl varies from -0.609 to -0.370; fz~ varies from -0.0082 to -0.0078; f~lzl varies from -3.680 to -2.171. v/~ = 700 GeV, nonasymptotic case: fz2 varies from -0.173 to -0.299; fz2 varies from -0.343 to -0.591; fz2 varies from -0.005 to -0.011; f~lz2 remains constant at -0.110. The pattern of form factors values for v ~ = 1000, 1200 GeV is almost identical to that of ~ = 700 GeV. Further the values of the form factors for (mr)DO (=169 GeV) follow identical pattern as that of (mt)eDF form factors values (see tables 5, 6, 9, 10). We conclude that the values of all the form factors with the exception of these of fz~, fz2 are comparable or larger than the S, T values and therefore the TGV contributions are important while deciding the use of extra U(1) model for doing physics beyond standard model.
W ħ H ∓ Z i (i=1,2) vertices available exclusively in the extra U(1) superstring-inspired model h... more W ħ H ∓ Z i (i=1,2) vertices available exclusively in the extra U(1) superstring-inspired model have been utilized to evaluate the W-W-γ vertex contribution at the one loop level. The expressions so obtained have been used to estimate the anomalous magnetic dipole moment (Δk WZ ...
Explicit evaluation of the following parameters has been carried out in the extraU (1) superstrin... more Explicit evaluation of the following parameters has been carried out in the extraU (1) superstring inspired model: (i) As Mz2 varies from 555 GeV to 620 GeV and (m t) CDF = 175.6 ± 5.7 GeV (Table 1): (a) SNew varies from -0.100 ± 0.089 to -0.130 ± 0.090, (b) TNew varies from -0.098 ± 0.097 to -0.129 ± 0.098,
Keeping in view the suggestion of Barr and Marciano [7] that the cut of procedure involves a good... more Keeping in view the suggestion of Barr and Marciano [7] that the cut of procedure involves a good deal of uncertainity in the prediction of E.D.M. of W - boson, we have re-examined the earlier calculation by Marciano and Queijeiro [2] by replacing the Cut-off regularization process by BPHZ regularization[8]. This works in a clean and unambiguous manner without involving any approximation. We also examine apparently inapplicable approximations like using m(f) = m(f')in [2]. The bounds on lambda(w) and d(w) are significantly changed in all cases as compared with those reported in [2]. The necessary caution that is to be excercised while using approximations is explicitly pointed out. PACS number (s): 13.40. Em
In the extra U(1) superstring inspired model, we examine the electroweak and) 1 (′ U symmetry bre... more In the extra U(1) superstring inspired model, we examine the electroweak and) 1 (′ U symmetry breaking with the singlet and exotic quark D , c D along with the study of heavy Z ′ boson in accordance with the top quark mass region. For this, we have done the analysis of complete renormalization group equations (RGEs) pertaining to the anomaly free 6
In the extra U(1) superstring inspired model, we examine the electroweak and U(1)-prime symmetry ... more In the extra U(1) superstring inspired model, we examine the electroweak and U(1)-prime symmetry breaking with the singlet and exotic quark D, D+{\c}along with the study of heavy Z-prime boson in accordance with the top quark mass region. For this, we have done the analysis of complete renormalization group equations (RGEs)pertaining to the anomaly free E-{\6}-Eta model of rank 5. The Z-prime is found to the order of TeV or above with allowed small Z-Zprime mixing angle, for which the large singlet VEV is required. This is done by considering the only non-universality of Yukawa couplings at GUT scale because these do not obey the E-{\6}relationship and also satisfies the unitarity constraints both at GUT and weak scale, where rest of the parameters, i.e., gaugino masses, tri-linear couplings, and soft supersymmetric breaking masses are kept universal at GUT scale with the gauge couplings unification. The large value of Yukawa couplings (order of 1) triggered the symmetry breaking ra...
Explicit evaluation of the following parameters has been carried out in the extra U(1) superstrin... more Explicit evaluation of the following parameters has been carried out in the extra U(1) superstring inspired model: (i) As Mz2 varies from 555 GeV to 620 GeV and (rnt)CD~ = 175.6 + 5.7 GeV (Table ): (a) S New varies from -0.100 4-0.089 to -0.130 4-0.090, (b) T New varies from -0.098 4-0.097 to -0.129 4-0.098, (c) U New varies from -0.229 4-0.177 to -0.253 4-0.206, (d) r z varies from 2.487 q-0.027 to 2.486 4-0.027, (e) ALrt varies from 0.0125 4-0.0003 to 0.0126 4-0.0003, (f) AbB remains constant at 0.0080 + 0.0007. Almost identical values are obtained for (mr)Do = 169 GeV (see table ). (ii) Triple gauge boson vertices (TGV) contributions : As Mz2 varies from 555 GeV to 620 GeV and (mt)CDF = 175.6 -I-5.7 GeV. (a) ~ = 500 GeV, asymptotic case : fl zl varies from -0.301 to -0.179; fzl varies from -0.622 to -0.379; fzl varies from +0.0061 to 0.0056; ]glzt varies from -3.691 to -2.186. fz2 varies from +0.270 to +0.118; fz2 varies from +0.552 to 0.238; fz2 varies from +0.0004 to +0.0002; .f~z2 remains constant at -0.110. (b) ~ = 700 GeV, asymptotic case: ]zl varies from -0.297 to -0.176; ]zl varies from -0.609 to -0.370; fz~ varies from -0.0082 to -0.0078; f~lzl varies from -3.680 to -2.171. v/~ = 700 GeV, nonasymptotic case: fz2 varies from -0.173 to -0.299; fz2 varies from -0.343 to -0.591; fz2 varies from -0.005 to -0.011; f~lz2 remains constant at -0.110. The pattern of form factors values for v ~ = 1000, 1200 GeV is almost identical to that of ~ = 700 GeV. Further the values of the form factors for (mr)DO (=169 GeV) follow identical pattern as that of (mt)eDF form factors values (see tables 5, 6, 9, 10). We conclude that the values of all the form factors with the exception of these of fz~, fz2 are comparable or larger than the S, T values and therefore the TGV contributions are important while deciding the use of extra U(1) model for doing physics beyond standard model.
W ħ H ∓ Z i (i=1,2) vertices available exclusively in the extra U(1) superstring-inspired model h... more W ħ H ∓ Z i (i=1,2) vertices available exclusively in the extra U(1) superstring-inspired model have been utilized to evaluate the W-W-γ vertex contribution at the one loop level. The expressions so obtained have been used to estimate the anomalous magnetic dipole moment (Δk WZ ...
Explicit evaluation of the following parameters has been carried out in the extraU (1) superstrin... more Explicit evaluation of the following parameters has been carried out in the extraU (1) superstring inspired model: (i) As Mz2 varies from 555 GeV to 620 GeV and (m t) CDF = 175.6 ± 5.7 GeV (Table 1): (a) SNew varies from -0.100 ± 0.089 to -0.130 ± 0.090, (b) TNew varies from -0.098 ± 0.097 to -0.129 ± 0.098,
Keeping in view the suggestion of Barr and Marciano [7] that the cut of procedure involves a good... more Keeping in view the suggestion of Barr and Marciano [7] that the cut of procedure involves a good deal of uncertainity in the prediction of E.D.M. of W - boson, we have re-examined the earlier calculation by Marciano and Queijeiro [2] by replacing the Cut-off regularization process by BPHZ regularization[8]. This works in a clean and unambiguous manner without involving any approximation. We also examine apparently inapplicable approximations like using m(f) = m(f')in [2]. The bounds on lambda(w) and d(w) are significantly changed in all cases as compared with those reported in [2]. The necessary caution that is to be excercised while using approximations is explicitly pointed out. PACS number (s): 13.40. Em
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