gravity. In pure GB gravity, the gravitational potential has a slower fall-off as compared to the
corresponding Einstein potential in the same dimension. It is therefore expected that the
energetics of a pure GB black hole would be weaker, and our analysis bears out that the
efficiency of energy extraction by the Penroseprocess is increased to 25.8% and the particle
acceleration is increased to 55.28%; the optical shadow of the black hole is decreased …