Tau tau Fusion to SUSY Higgs Bosons at a Photon Collider: Measuring   tan(beta)
  Tau tau fusion to light h and heavy H,A Higgs bosons is investigated in the Minimal Supersymmetric Standard Model (MSSM) at a photon collider as a promising channel for measuring large values of tan(beta). For standard design parameters of a photon collider an error close to unity, uniform for tan(beta) above 10, may be expected, improving on complementary measurements at LHC and e+e- linear colliders. 
S. Y. Choi, J. Kalinowski, J. S. Lee, M. M. Muehlleitner, M. Spira and   P. M. Zerwas