# Stable matter of 4th generation: hidden in the Universe and close to detection?

Source: [Stable matter of 4th generation: hidden in the Universe and close to detection?](<https://www.sota2.com/research/paper/68fa34e41e209131ce89ce37>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-24T20:56:56.883Z

Authors: K.Belotsky, M.Khlopov, K.Shibaev

Published: 2006-02-11T23:49:51.000Z

## Abstract

Stable neutrino and U quark of 4th generation are excluded neither by experimental data, nor by astrophysical constraints. Moreover, excess of stable $\\bar U$ quarks in the Universe can lead to an exciting composite nuclear-interacting form of dark matter, which can even dominate in large scale structure formation.

## Recorded benchmark results

A research result applies to its stated dataset, split, metric and evaluation configuration. Compare like-for-like settings, preserve the metric's unit and direction, and distinguish paper-reported results from independent reproduction. The best result recorded here is not a claim of exhaustive, current global coverage.

## Original sources and implementation

[Original paper](<https://arxiv.org/abs/astro-ph/0602261>)

[PDF](<https://arxiv.org/pdf/astro-ph/0602261.pdf>)