Particle-like ultracompact objects in Einstein-scalar-Gauss-Bonnet theories

We construct particle-like solutions in Einstein-scalar-Gauss-Bonnet theories in four spacetime dimensions, representing globally regular spacetime manifolds. The scalar field diverges at the origin, but the effective stress-energy tensor is free from pathologies. We determine their domain of existence and compare with wormhole solutions, black holes and Janis-Newman-Winicourt-Wyman (JNWW) solutions, also known as Fisher solution. Many of the particle-like solutions represent ultracompact objects, featuring a lightring and echos.