Magnetic Polarizability of Virtual (ss') and (cc') Pairs in the Nucleon

TL;DR

This paper investigates how internal magnetic fields within nucleons polarize virtual quark pairs, affecting their quantum states and contributing to the nucleons' magnetic properties, with implications for understanding quark dynamics.

Contribution

It introduces a model where internal magnetic fields induce polarization of virtual quark pairs via quadratic Zeeman interaction, highlighting differences between proton and neutron.

Findings

Induced s-quark polarization in neutron is opposite to that in proton.

Internal magnetic fields influence the quantum state admixture of virtual quark pairs.

Chromo-magnetic fields may also affect virtual (cc') pairs in nucleons.

Abstract

We suggest 3P0 quantum state of virtual (ss') pairs in the nucleon can be polarised by the internal fields permeating the volume of the nucleon (proton or neutron). Due to the quadratic Zeeman interaction, 3P0 wavefunction of virtual (qq') pairs acquires the admixture of 1P10 quantum state in the magnetic field, which generates the antiparallel polarization of s and s' quarks (in the nucleon). Considering the internal magnetic fields of neutron and proton (originating from their measured magnetic dipole moments), we suggest the induced s-quark polarization in the neutron to be of the oposite direction compared to the proton case. We mention the influence of the internal chromo-magnetic fields on the quantum state of (qq') pairs in the nucleon and we discuss also the expected behaviour of virtual (cc') pairs.