Gravitinos Tunneling from Black Holes

TL;DR

This paper investigates the quantum tunneling process of gravitinos, spin-3/2 fermions, from black holes, demonstrating they emit radiation at the Hawking temperature, consistent across all spin states and matching known black hole temperatures.

Contribution

It provides a detailed analysis of gravitino tunneling from black holes, extending Hawking radiation theory to include spin-3/2 particles and confirming temperature consistency across spin states.

Findings

All four gravitino spin states emit at the same temperature.

The emission temperature matches the Hawking and Unruh temperatures.

The analysis applies to Kerr-Newman black holes and Rindler spacetime.

Abstract

Black hole radiation of gravitinos is investigated as the classically forbidden tunneling of spin-3/2 fermions through an event horizon. We show that all four spin states of the gravitino yield the same emission temperature, and retrieve the Unruh temperature in a Rindler spacetime as well as the Hawking temperature for a Kerr-Newman charged rotating black hole.