Near-Extremal Charged Black Holes: Greybody Factors and Evolution

Understand

As a charged black hole reaches its extremal state via Hawking radiation, quantum effects become important for its thermodynamic properties when its temperature is below a mass gap scale.

• Using AdS$_2$/CFT$_1$ correspondence and solutions for the corresponding Schwarzian action, we calculate the black hole greybody factors including the quantum effects.
• In the low temperature limit, the greybody factors scale as $T^{2s + 3/2}$ with $s$ the radiated field spin.
• Hence, the Hawking radiation of a near-extremal charged black hole (NEBH) is dominated by emitting scalar particles including the Higgs boson.