What does this research mean for the field?

Excited kinks in a scalar field can decay through fermion pair production, providing an alternative decay mechanism to scalar radiation emission. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

This research aims to identify a new decay mechanism for excited kinks by examining fermion pair production alongside scalar radiation.

February 25, 2026Open Access

Quantum fermion emission from excited kinks

Key Points

This research aims to identify a new decay mechanism for excited kinks by examining fermion pair production alongside scalar radiation.
Developed a simple extension of the phi 4 model with a Yukawa-like interaction.
Investigated power emitted through fermions based on coupling constants.
Conducted the analysis in a semi-classical limit without backreaction.
Identified a power-law decay of the amplitude of excited shape modes.
Found that fermion emissions vary significantly with the coupling strength.
Compared the emitted power from fermions to that of purely scalar radiation.

Abstract

A bstract The amplitude of an excited shape mode in a kink is expected to decay with a well-known power law via scalar radiation emission due to the nonlinear self-coupling of the scalar field. In this work we propose an alternative decay mechanism via pair production of fermions in a simple extension of the ϕ 4 model in which the scalar field is coupled to a (quantum) fermionic field through a Yukawa-like interaction term. We study the power emitted through fermions as a function of the coupling constant in the semi-classical limit (without backreaction) and compare it to the case of purely scalar radiation emission.

Demander à l'IA

Bookmark

View Full Paper