A Study of Heavy Higgs Properties at a Multi-TeV e+e- Collider
  The precise determination of the masses of the neutral and charged heavy Higgs bosons is a crucial input for the study of Supersymmetry and its relation with cosmology through dark matter. This paper presents a study of e+e- -> HA and H+H- production at sqrts=3 TeV. The analysis is performed with full simulation and reconstruction accounting for beamstrahlung effects and the overlay of gamma gamma -> hadrons events. Results are presented in terms of the accuracy on the determination of the masses and widths of the heavy Higgs bosons in two benchmark scenarios. 
Marco Battaglia, Frederik Bogert, Arnaud Ferrari, Johan Relefors and   Sarah Zalusky
hep-ex