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Research Paper | Cosmology Science | Volume 15 Issue 4, April 2026 | Pages: 1280 - 1283 | United States
Curvature-Dependent CP Asymmetry and Gravitational Selection in Baryogenesis
Abstract: The observed matter-antimatter asymmetry of the universe, characterized by a baryon-to-photon ratio ηB ≈ 6 ? 10-10, is commonly attributed to CP-violating amplitudes in local quantum field interactions treated against a nearly flat spacetime background. This study examines the matter-antimatter asymmetry of the universe, characterized by a baryon-to-photon ratio ηB ≈ 6 ? 10-10. We propose a framework in which CP violation, spacetime curvature, and global energy balance are dynamically coupled in the early universe. Using an effective field theory approach in curved spacetime, we show that CP-violating amplitudes can receive curvature-dependent corrections that become dominant at Planck-scale curvature, yielding εCP values up to 10-4 to 10-8. We further demonstrate that the Hamiltonian constraint, combined with photon binding energy, restricts viable baryogenesis scenarios and naturally selects small matter excess consistent with observations. Additionally, nonlinear curvature effects enhance the localization of photon energy into matter over antimatter, amplifying asymmetry. Order-of-magnitude estimates indicate that the observed ηB can arise for coefficients c1 ≈ 10-2. The framework predicts observable signatures in gravitational waves and cosmic microwave background non-Gaussianity, suggesting a gravitational contribution to baryogenesis.
Keywords: baryogenesis, CP violation, curved spacetime, effective field theory, gravitational energy, matter-antimatter asymmetry, Misner-Sharp energy
How to Cite?: Russell Crawford, "Curvature-Dependent CP Asymmetry and Gravitational Selection in Baryogenesis", Volume 15 Issue 4, April 2026, International Journal of Science and Research (IJSR), Pages: 1280-1283, https://www.ijsr.net/getabstract.php?paperid=SR26419035108, DOI: https://dx.dx.doi.org/10.21275/SR26419035108