Charged gravitational instantons in five-dimensional   Einstein-Gauss-Bonnet-Maxwell theory
  We study a solution of the Einstein-Gauus-Bonnet theory in 5 dimensions coupled to a Maxwell field, whose euclidean continuation gives rise to an instanton describing black hole pair production. We also discuss the dual theory with a 3-form field coupled to gravity. 
S. Mignemi (Universita di Cagliari)