On the existence of a static black hole on a brane

TL;DR

This paper investigates the existence of static black holes on a brane in the Randall-Sundrum II model, developing a high-accuracy numerical code and providing evidence that such solutions may not exist for nonzero brane tension.

Contribution

The study introduces a nearly 4th-order accurate numerical method to analyze black holes on a brane and explores the potential nonexistence of solutions with nonzero brane tension.

Findings

Numerical errors suggest no static black hole solutions for nonzero brane tension.

Approximate solutions may exist for very small brane tension.

Potential instability of brane black holes could lead to horizon and brane pinch phenomena.

Abstract

We study a static black hole localized on a brane in the Randall-Sundrum (RS) II braneworld scenario. To solve this problem numerically, we develop a code having the almost 4th-order accuracy. This code derives the highly accurate result for the case where the brane tension is zero, i.e., the spherically symmetric case. However, a nonsystematic error is detected in the cases where the brane tension is nonzero. This error is irremovable by any systematic methods such as increasing the resolution, setting the outer boundary at more distant location, or improving the convergence of the numerical relaxation. We discuss the possible origins for the nonsystematic error, and conclude that our result is naturally interpreted as the evidence for the nonexistence of solutions to this setup, although an "approximate" solution exists for sufficiently small brane tension. We discuss the possibility that the black holes produced on a brane may be unstable and lead to two interesting consequences: the event horizon pinch and the brane pinch.