Magnetic field-induced enhancement and quenching of Urca emission in quark matter
Abstract
Using first-principles field-theoretic methods, we investigate neutrino emission from strongly magnetized dense quark matter under conditions relevant to compact stars. We account for Landau-level quantization of both electron and quark states and show that it strongly modifies the kinematics of Urca processes. In particular, quark quantization restricts the available phase space in which both quark and electron energies can simultaneously lie near their respective Fermi surfaces. At moderately strong magnetic fields, before pronounced quark quantization sets in, the emission rate tends to increase on average with increasing field strength. In the regime of very strong fields, however, the increasingly restricted phase space first gives rise to Shubnikov--de Haas-type oscillations and then to resonance-like spikes near a discrete sequence of Urca-resonant magnetic field values, separated by regions of strong suppression. Finally, the emission rate becomes nearly completely quenched once |eB| ≳ 6μeμu, corresponding to approximately B≳ 1.5× 1019 G for the representative set of model parameters considered. We also find significant anisotropy in the longitudinal momentum emission near the Urca-resonant magnetic field values.
Related
- Constraints on Dark Matter Annihilation from Starlight-Induced Inverse Compton Emission in Omega Centauri
- Simulations of a Conducting Sphere Moving through Magnetized Plasma II: Effect of Internal Magnetic Fields and Enhancement of Alfvénic Drag
- Lunar radio emission from dark photon dark matter
- Formation and enhancement of coronal rain induced by a large-scale coronal wave
- Possible High-Energy Neutrino Emission from Dark Matter Annihilation in the Disrupting Dwarf Galaxy Boötes~III
BibTeX
@misc{gyory2026magnetic,
title = {{Magnetic field-induced enhancement and quenching of Urca emission in quark matter}},
author = {William Gyory and Igor A. Shovkovy},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.00157},
eprint = {2609.00157},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.00157},
note = {CC BY-SA 4.0},
}
RIS
TY - UNPB
TI - Magnetic field-induced enhancement and quenching of Urca emission in quark matter
AU - William Gyory
AU - Igor A. Shovkovy
PY - 2026
DA - 2026/09/01
PB - arXiv
DO - 10.48550/arxiv.2609.00157
UR - https://arxiv.org/abs/2609.00157
AB - Using first-principles field-theoretic methods, we investigate neutrino emission from strongly magnetized dense quark matter under conditions relevant to compact stars. We account for Landau-level quantization of both electron and quark states and show that it strongly modifies the kinematics of Urca processes. In particular, quark quantization restricts the available phase space in which both quark and electron energies can simultaneously lie near their respective Fermi surfaces. At moderately strong magnetic fields, before pronounced quark quantization sets in, the emission rate tends to increase on average with increasing field strength. In the regime of very strong fields, however, the increasingly restricted phase space first gives rise to Shubnikov--de Haas-type oscillations and then to resonance-like spikes near a discrete sequence of Urca-resonant magnetic field values, separated by regions of strong suppression. Finally, the emission rate becomes nearly completely quenched once |eB| ≳ 6μ_eμ_u, corresponding to approximately B≳ 1.5× 10^19 G for the representative set of model parameters considered. We also find significant anisotropy in the longitudinal momentum emission near the Urca-resonant magnetic field values.
ER -