The U-Cell Model vs Weak Gravitational Lensing: S8 Constraints from KiDS, DES, and ACT, and the Prediction sigma_eff/v_flat=0.463

Norbert Prebeck

doi:10.5281/zenodo.19412664

April 4, 2026Open Access

The U-Cell Model vs Weak Gravitational Lensing: S8 Constraints from KiDS, DES, and ACT, and the Prediction sigma_eff/v_flat=0.463

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Key Points

The aim is to compare the S8 parameter from the U-Cell Model with weak gravitational lensing results from various surveys.
Comparison of U-Cell Model S8 value with data from KiDS-1000, DES Y3, KiDS Legacy, and ACT DR6.
Analysis of lensing results including a calculation of the S8 tension across cosmological models.
U-Cell Model predicts S8=0.831 based on cosmological parameters.
Weak gravitational lensing data shows S8 tension affects both Lambda CDM and U-cell models equally.
Key prediction identified: sigma_eff/v_flat is approximately 0.463, proposed for further testing.

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Implication

This analysis compares U-Cell Model predictions with weak gravitational lensing outcomes, highlighting implications for cosmological models.

Abstract

Compares UCM S8=0.831 (from Omega_m=0.3166 + Planck sigma8)against KiDS-1000, DES Y3, KiDS Legacy (2025), and ACT DR6 lensing.KiDS Legacy: 0.9sigma. The S8 tension equally affects ΛCDM and isnot specific evidence against UCM. Specific UCM predictionsigma_eff/v_flat=sqrt(1-pi/4)=0.463 identified as key future test.

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Norbert Prebeck (2026) studied this question.

synapsesocial.com/papers/69d34e739c07852e0af9803e https://doi.org/10.5281/zenodo.19412664

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The U-Cell Model vs Weak Gravitational Lensing: S8 Constraints from KiDS, DES, and ACT, and the Prediction sigma_eff/v_flat=0.463

Key Points

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Implication

Abstract

Discussion

Cite This Study

The U-Cell Model vs Weak Gravitational Lensing: S8 Constraints from KiDS, DES, and ACT, and the Prediction sigma_eff/v_flat=0.463

Key Points

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Implication

Abstract

Discussion

Cite This Study

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