Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1995-04-17
Phys.Lett.B355:209-221,1995
Physics
High Energy Physics
High Energy Physics - Phenomenology
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Scientific paper
10.1016/0370-2693(95)00694-G
We propose, for the computation of the Higgs mass spectrum and couplings, a renormalization-group improved leading-log approximation, where the renormalization scale is fixed to the top-quark pole mass. For the case $m_A\sim M_{\rm SUSY}$, our leading-log approximation differs by less than 2 GeV from previous results on the Higgs mass computed using a nearly scale independent renormalization-group improved effective potential up to next-to-leading order. Moreover, for the general case $m_A\simlt M_{\rm SUSY}$, we provide analytical formulae (including two-loop leading-log corrections) for all the masses and couplings in the Higgs sector. For $M_{\rm SUSY}\simlt 1.5$ TeV and arbitrary values of $m_A$, $\tan\beta$ and the stop mixing parameters, they reproduce the numerical renormalization-group improved leading-log result for the Higgs masses with an error of less than 3 GeV. For the Higgs couplings, our analytical formulae reproduce the numerical results equally well. Comparison with other methods is also performed.
Carena Marcela
Espinosa Jose Ramon
Quiros Mariano
Wagner Carlos E. M.
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