Heavy Dark Baryons at Large N: Self-Interactions across All Scales
Abstract
We show that heavy dark baryons in a confining SU(N) sector with a moderately large number of colors, N∼10--$100$, can generate self-interactions spanning the full range of astrophysical velocities. Their chromo-electric polarizability induces van der Waals interactions that yield σ/mDM∼30-100 cm2/g at dwarf-galaxy velocities, decrease to the values required by galaxy clusters, and rise to $100−1000~\mathrm{cm^2/g}$ at velocities of a few km/s, as suggested by the second perturber of JVAS B1938+666. Remarkably, for a given ratio mQ/Λd, these observations can be used to infer the value of N. The resulting self-interaction phenomenology favors GeV-scale dark baryons, independently of the relic-abundance requirement. At these masses, a dark baryon asymmetry comparable to the visible one can account for the observed dark-matter abundance.
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BibTeX
@misc{garcia2026heavy,
title = {{Heavy Dark Baryons at Large $N$: Self-Interactions across All Scales}},
author = {Giovani Dalla Valle Garcia and Juan Herrero-Garc\'ıa},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.39158},
eprint = {2609.39158},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.39158},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Heavy Dark Baryons at Large N: Self-Interactions across All Scales
AU - Giovani Dalla Valle Garcia
AU - Juan Herrero-Garc\'ıa
PY - 2026
DA - 2026/09/30
PB - arXiv
DO - 10.48550/arxiv.2609.39158
UR - https://arxiv.org/abs/2609.39158
AB - We show that heavy dark baryons in a confining SU(N) sector with a moderately large number of colors, N∼10--$100$, can generate self-interactions spanning the full range of astrophysical velocities. Their chromo-electric polarizability induces van der Waals interactions that yield σ/m_DM∼30-100 cm^2/g at dwarf-galaxy velocities, decrease to the values required by galaxy clusters, and rise to $100−1000~\mathrm{cm^2/g}$ at velocities of a few km/s, as suggested by the second perturber of JVAS B1938+666. Remarkably, for a given ratio m_Q/Λ_d, these observations can be used to infer the value of N. The resulting self-interaction phenomenology favors GeV-scale dark baryons, independently of the relic-abundance requirement. At these masses, a dark baryon asymmetry comparable to the visible one can account for the observed dark-matter abundance.
ER -