Precision measurements in the MSSM Higgs sector with ATLAS

The Higgs sector in the MSSM is expected to be explored with ATLAS at the LHC in various decay channels, if supersymmetry exists. The two parameters of the MSSM sector (m_A, tan(beta)) could then possibly be measured. The masses of the Higgs bosons can be easily measured from the position of the reconstructed mass peak. The parameter tan(beta), on the other hand, can be determined in some of these analyses via the measurement of the related production rates. The precision which can be accomplished in these measurements is the objective of this note.