Resonant CP violation in Higgs radiation at an e+e- linear collider -: art. no. 0956006

We study resonant CP violation in the Higgsstrahlung process e(+)e(-)-> H-1,H-2,H-3(Z -> e(+)e(-),mu(+)mu(-)) and subsequent decays H-1,H-2,H-3 -> b (b) over bar,tau(-)tau(+), in the minimal supersymmetric extension of the standard model (MSSM) with Higgs-sector CP violation induced by radiative corrections. At a high-energy e(+)e(-) linear collider, the recoil-mass method enables one to determine the invariant mass of a fermion pair produced by Higgs decays with a precision as good as 1 GeV. Assuming an integrated luminosity of 100 fb(-1), we show that the production line shape of a coupled system of neutral Higgs bosons decaying into b (b) over bar quarks is sensitive to the CP-violating parameters. When the Higgs bosons decay into tau(-)tau(+), two CP asymmetries can be defined using the longitudinal and transverse polarizations of the tau leptons. Taking into account the constraints from electric dipole moments, we find that these CP asymmetries can be as large as 80%, in a trimixing scenario where all three neutral Higgs states of the MSSM are nearly degenerate and mix significantly.