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Abstract
We examine the prospects for determining \(tan \beta\) from heavy Higgs scalar production
in the minimal supersymmetric standard model at a future \(e^+ e^-\) collider. Our analysis
is independent of assumptions of parameter unification, and we consider general radiative
corrections in the Higgs sector. Bounds are presented for \(\sqrt{s} = 500\) GeV and
1 TeV, several Higgs masses, a variety of integrated luminosities and b-tagging efficiencies,
and in scenarios with and without supersymmetric decays of the Higgs bosons. We find
stringent constraints for \(3 \alt tan \beta \alt 10\), and, for some scenarios, also
interesting bounds on high \(tan \beta\) through \(tbH^{\pm}\) production. These bounds
imply that simple Yukawa unifications may be confirmed or excluded. Implications for
soft scalar mass determination and top squark parameters are also discussed.