Projective structure, symplectic connection and quantization

Let X be a connected Riemann surface equipped with a projective structure p. Let E be a holomorphic symplectic vector bundle over X equipped with a at connection. There is a holomorphic symplectic structure on the total space of the pullback of E to the space of all nonzero holomorphic cotangent vectors on X. Using p, this symplectic form is quantized. A moduli space of Higgs bundles on a compact Riemann surface has a natural holomorphic symplectic structure. Using p, a quantization of this symplectic form over a Zariski open subset of the moduli space of Higgs bundles is constructed.