Inclusion of Z->b b-bar vertex corrections in Precision Electroweak Tests on the Sp(6)_L X U(1)_Y Model

Details Inclusion of Z->b b-bar vertex corrections in Precision Electroweak Tests on the Sp(6)_L X U(1)_Y Model Inclusion of Z->b b-bar vertex corrections in Precision Electroweak Tests on the Sp(6)_L X U(1)_Y Model

1994-05-23

arxiv.org/abs/hep-ph/9405354v1

Int.J.Mod.Phys. A10 (1995) 4387-4398

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex, 16 pages+4 figures(not included but available as uuencoded or PS files from gtpark@phya.snu.ac.kr), PURD-TH-94-08, SNUT

Scientific paper

We extend our previous work on the precision electroweak tests in the Sp(6)_L X U(1)_Y family model to include for the first time the important Z->b b-bar vertex corrections encoded in a new variable epsilon_b, utilizing all the latest LEP data. We include in our analysis the one loop EW radiative corrections due to the new bosons in terms of epsilon_1, epsilon_b and $\Delta\Gamma_Z$. We find that the correlation between epsilon_1 and epsilon_b makes the combined constraint much stronger than the individual ones. The model is consistent with the recent CDF result of $m_t=174\pm 10^{+13}_{-12}\GeV$, but it can not accomodate $m_t\gsim 195\GeV$.

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