The moduli space of stable quotients

Stable quotients are quotients of trivial vector bundles on nodal curves satisfying some properties. The notion arises to relate the moduli of stable maps to the quot scheme over nonsingular curves. Just as the moduli of stable maps, the moduli of stable quotients carry a virtual fundamental class and has a map to \bar{M}_{g, n} so it makes sense to talk about invariants similar to GW. I will describe this moduli space, define its invariants and relate it to GW invariants on the moduli of stable maps with grassmanians as target.