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This content will become publicly available on March 1, 2026

Title: Mass and force relations for extremal Einstein-Maxwell-dilaton-axion black holes
We investigate various properties of extremal dyonic static black holes in Einstein-Maxwell-Dilaton-Axion theory. We obtain a simple first-order ordinary differential equation for the black hole mass in terms of its electric and magnetic charges, which we can solve explicitly for certain special values of the scalar couplings. For one such case we also construct new dyonic black hole solutions, making use of the presence of an enhanced S L ( 2 , R ) symmetry. Finally, we investigate the structure of long range forces and binding energies between nonequivalent extremal black holes. For certain special cases, we can identify regions of parameter space where the force is always attractive or repulsive. Unlike in the case without an axion, the force and binding energies between distinct black holes are not always correlated with each other. Our work is motivated in part by the question of whether long range forces between nonidentical states can potentially encode information about UV constraints on low-energy physics. Published by the American Physical Society2025  more » « less
Award ID(s):
2210271
PAR ID:
10585041
Author(s) / Creator(s):
; ; ;
Publisher / Repository:
Physical Review D
Date Published:
Journal Name:
Physical Review D
Volume:
111
Issue:
6
ISSN:
2470-0010
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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