A new solution to the Callan Rubakov effect
Year: 2024
Type: article
Abstract: A bstract In this paper we study the scattering of massive fermions off of smooth, spherically symmetric monopoles in 4 d SU(2) gauge theory. We propose a complete physical picture of the monopole-fermion interaction which encompasses all angular momentum modes. We show that as an in-going fermion scatters off a monopole, it excites trapped W -bosons in the monopole core by a version of the Witten effect so that the monopole can accrue charge and transform into a dyon at parametrically low energies. The imparted electric charge is then protected from decay by an emergent ℤ N generalized global symmetry, creating a stable dyon. At sufficiently low energies, the scattered fermion can be trapped by the dyon’s electrostatic potential, forming a bound state, which can decay into spherically symmetric fermion modes subject to the preserved ℤ N global symmetry. We propose that monopole-fermion scattering can be described in this way without needing to add “new” states to the Hilbert space, thereby eliminating a long standing confusion in the Callan Rubakov effect.
Source: Journal of High Energy Physics
Author: T. Daniel Brennan
Institution: University of California San Diego
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4405016011