PreprintCC BY-NC-SA 4.0arXiv
The chiral filter
Abstract
Thermal neutron capture on a proton, np→ dγ, is measured to a fraction of a percent; the impulse approximation misses nine percent of it. This article follows that gap through five decades of an idea of Mannque Rho's, the chiral filter. Chiral symmetry fixes the pion-exchange current that fills the gap, and power counting explains why nothing else competes. The missing nine percent becomes a prediction, correct within errors. On the unprotected side, one constant fixed by tritium beta decay predicted solar pp fusion and the {\it hep} process; gA* remains open.
Related
- Analytical Markov Chain for Spatiotemporal Flux Evolution of the Inner Filter Effect in Fluorescent Media
- Passive axial confinement in two-photon lithography with a 3D-printed pupil filter
- 3D kinematics using a fast extended Kalman filter relying on multiview 2D pose observations
- Sub-pixel nanosecond laser irradiation of a color CMOS image sensor: damage thresholds and the role of the color filter array
- Design and fabrication of a silicon nitride double-ring Vernier filter for narrow-linewidth external-cavity laser in co-packaged optics
BibTeX
@misc{park2026chiral,
title = {{The chiral filter}},
author = {Tae-Sun Park},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.16543},
eprint = {2609.16543},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.16543},
note = {CC BY-NC-SA 4.0},
}
RIS
TY - UNPB
TI - The chiral filter
AU - Tae-Sun Park
PY - 2026
DA - 2026/09/15
PB - arXiv
DO - 10.48550/arxiv.2609.16543
UR - https://arxiv.org/abs/2609.16543
AB - Thermal neutron capture on a proton, np→ dγ, is measured to a fraction of a percent; the impulse approximation misses nine percent of it. This article follows that gap through five decades of an idea of Mannque Rho's, the chiral filter. Chiral symmetry fixes the pion-exchange current that fills the gap, and power counting explains why nothing else competes. The missing nine percent becomes a prediction, correct within errors. On the unprotected side, one constant fixed by tritium beta decay predicted solar pp fusion and the {\it hep} process; g_A^* remains open.
ER -