Topic: Four-derivative corrections to Kerr-Sen black holes
Speaker: Dr. Robert Saskowski
Coordinates: PCFT C1124, 16:00, Tuesday, September 23
Abstract: Heterotic supergravity reduced on a torus exhibits a hidden O(d+p, d) symmetry that can be used to generate solutions. I will show how this can be used to generate four-derivative corrections to the Kerr-Sen solution in four dimensions by applying an O(2, 1) boost to the Kerr solution. In the process, we will find a new consistent four-derivative truncation of heterotic supergravity that is equivalent to the gauge field couplings of the Bergshoeff-de Roo action. While the Kerr-Sen solution has multipole moments matching those of the Kerr(-Newman) solution at the two-derivative level, the four derivative corrections break this degeneracy, even for the most general four-derivative Einstein-Maxwell action, and open the possibility of experimental tests.