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Consequences of Recent Electroweak Data and W-mass for the Top Quark and Higgs Masses

Kyungsik Kang·Sin Kyu Kang
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Abstract

We critically reexamine the precision tests of the standard model by coupling the current world average value of $M_W$ with the recent LEP electroweak data with the aid of a modified ZFITTER program to include the dominant two-loop and QCD-EW mixed terms. The results show a clear evidence of nonvanishing electroweak radiative corrections. The recent CDF $m_t$ is a solution of the minimal $χ^2$-fits to the recent LEP data set and $M_W=80.23(18)~$ GeV but with a heavy Higgs scalar, i.e., $m_t=179~$ GeV and $m_H=300~$ GeV. We discuss how sensitive $m_t$ and $m_H$ are depending on the exact value of $M_W$ even within the present uncertainty, as well as on $α_s$ and $α(M_Z)$. We show how the future improvements on $M_W$ can discriminate different values of $m_t$ and $m_H$ from the electroweak data and provide a crucial and decisive test for the standard model.

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Kyungsik Kang, Sin Kyu Kang. 1995-03-31. Consequences of Recent Electroweak Data and W-mass for the Top Quark and Higgs Masses. https://arxiv.org/abs/hep-ph/9503478

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