Determining tanβ in ττ fusion to SUSY Higgs bosons at a photon collider

We investigate ττ fusion to light h and heavy H and A Higgs bosons in the Minimal Supersymmetric Standard Model (MSSM) at a photon collider as a promising channel for measuring large values of tanβ. For standard design parameters of a photon collider an error Δtanβ∼1, uniformly for tanβ≳10, is expected from this theoretical study, improving on complementary measurements at the LHC and e+e− linear colliders, and encouraging detailed experimental simulations.