Comments on the Moduli Dynamics of 1/4 BPS Dyons
Dongsu Bak, Kimyeong Lee

TL;DR
This paper derives a nonrelativistic Lagrangian describing the low energy dynamics of 1/4 BPS dyons by analyzing fluctuations around classical configurations, focusing on zero modes of 1/2 BPS monopoles.
Contribution
It provides a new derivation of the low energy effective Lagrangian for 1/4 BPS dyons using fluctuation analysis around classical monopole solutions.
Findings
Derived the nonrelativistic Lagrangian for 1/4 BPS dyons.
Identified zero modes of 1/2 BPS monopoles as key fluctuations.
Clarified the dynamics of dyons near BPS configurations.
Abstract
We rederive the nonrelativistic Lagrangian for the low energy dynamics of 1/4 BPS dyons by considering the time dependent fluctuations around classical 1/4 BPS configurations. The relevant fluctuations are the zero modes of the underlying 1/2 BPS monopoles.
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