Does black hole continuum spectrum signal f(R) gravity in higher dimensions?

Understand

Extra dimensions, which led to the foundation and inception of string theory, provide an elegant approach to force-unification.

• With bulk curvature as high as the Planck scale, higher curvature terms, namely f(R) gravity seems to be a natural addendum in the bulk action.
• These can not only pass the classic tests of general relativity but also serve as potential alternatives to dark matter and dark energy.
• With interesting implications in inflationary cosmology, gravitational waves and particle phenomenology it is worth exploring the impact of extra dimensions and f(R) gravity in black hole accretion.