Nonrenormalization of Mass of Some Nonsupersymmetric String States

TL;DR

The paper proposes that certain massive nonsupersymmetric string states have quantum mass corrections that vanish at all orders, explaining the match between their degeneracy and black hole entropy.

Contribution

It introduces an approximate nonrenormalization principle for the mass of specific nonsupersymmetric string states, extending understanding of their quantum stability.

Findings

Quantum corrections to some massive states vanish at all orders.

This nonrenormalization explains the degeneracy and black hole entropy agreement.

Mass corrections decrease inversely with tree-level mass.

Abstract

It is argued that the quantum correction to the mass of some very massive, nonsupersymmetric states vanishes in inverse proportion to their tree-level mass to all orders in string loops. This approximate nonrenormalization can explain the agreement between the perturbative degeneracy of these states and the Sen entropy of the associated black holes.