# A Novel Foamy Origin for Singlet Fermion Masses

## TL;DR

This paper proposes a new mechanism where interactions with D-particle space-time foam generate large dynamical masses for singlet fermions, potentially explaining neutrino masses through a novel foam-mediated process.

## Contribution

It introduces a novel foam-based interaction model that directly generates large masses for singlet fermions, extending previous work on charged fermions.

## Key findings

- D-particle interactions can produce large fermion masses
- Massless vector excitations mediate forces between singlet fermions
- Generated masses can be transmitted to neutrinos via the seesaw mechanism

## Abstract

We show how masses for singlet fermions can be generated by interactions with a D-particle model of space-time foam inspired by brane theory. It has been shown previously by one of the authors (N.E.M.) such interactions may generate generate dynamically small masses for charged fermions via the recoils of D-particle defects interacting with photons. In this work we consider the direct interactions of D-particle with uncharged singlet fermions such as right-handed neutrinos. Quantum fluctuations of the lattice of D-particles have massless vector (spin-one) excitations that are analogues of phonons. These mediate forces between the singlet fermions, generating large dynamical masses that may be communicated to light neutrinos via the seesaw mechanism.