tan β determination from heavy Higgs boson production at linear colliders -: art. no. 075002

We study the production at future e(+)e(-) linear colliders of the heavy neutral Higgs bosons H and A of the minimal supersymmetric standard model in association with top and bottom quarks. The cross sections have a strong dependence on the parameter tan beta, and thus provide a good way to determine it. At a linear collider with roots=0.5-1 TeV and expected integrated luminosities, we find significant sensitivities for determining tan beta. In the supergravity scenario, the sensitivity is particularly strong for tan beta greater than or similar to 10, reaching a 15% or better measurement. In the general MSSM scenario, the interplay between the 4b and 4t channels results in a good determination for tan beta less than or similar to 10, while the sensitivity is weakened for higher values of tan beta.