Gromov-Witten invariants for G/B and Pontryagin product for \Omega K
  We give an explicit formula for (T-equivariant) 3-pointed genus zero Gromov-Witten invariants for G/B.   We derive it by finding an explicit formula for the equivariant Pontryagin product on the homology of the based loop group \Omega K. 
Naichung Conan Leung, Changzheng Li