Eur. Phys. J. C (2020) 80: 280
https://doi.org/10.1140/epjc/s10052-020-7841-x

Regular Article - Theoretical Physics

Regularization of electroweak monopole by charge screening and BPS energy bound

¹ School of Physics and Astronomy, Sun Yat-Sen University, Zhuhai, 519082, China
² Institute of Modern Physics, Chinese Academy of Science, Lanzhou, 730000, China
³ School of Physics and Astronomy, Seoul National University, Seoul, 08826, Korea
⁴ Center for Quantum Spacetime, Sogang University, Seoul, 04107, Korea

^* e-mail: zoulp@impcas.ac.cn

Received: 5 January 2020
Accepted: 12 March 2020
Published online: 27 March 2020

Abstract

We show that the electroweak monopole can be regularized with a non-vacuum electromagnetic permittivity. This allows us to set a new BPS bound for the monopole mass, which implies that the mass may not be smaller than 2.98 TeV, more probably 3.75 TeV. We demonstrate that the same method can also regularize the Dirac monopole, which enhances the possibility to construct the Dirac monopole of mass of a few hundred meV in condensed matters. We discuss the physical implications of our result.