The Khandro Field Theory (KFT): Consistency Conditions from Shapiro Delay and Constraints from Delbrück Analogues

Article Description: The Khandro Field Theory (KFT)

This paper, “The Khandro Field Theory (KFT): Consistency Conditions from Shapiro Delay and Constraints from Delbrück Analogues,” presents a foundational step toward a unified field framework based on a single fundamental scalar field, ϕ\phiϕ (the Khandro field). KFT proposes that this field acts as the physical medium underlying all known interactions — providing a common foundation for gravitation, electromagnetism, and the mechanisms of mass generation.

Core Principles and Unification

KFT challenges the geometric interpretation of gravitation in General Relativity (GR) by introducing a field-theoretic formulation in which spacetime curvature emerges as an effective phenomenon of ϕ\phiϕ-field dynamics. In this picture:

• Mass Generation: Inertial mass arises through a Yukawa-like coupling to the scalar field ϕ\phiϕ.

• Variable Speed of Light (VSL): The local effective light speed cEMc_{\mathrm{EM}}cEM depends on the ambient ϕ\phiϕ-field density, linking optical propagation to gravitational potential. Importantly, KFT predicts that light propagation is also influenced by the medium: for example, the effective speed of light decreases slightly when passing from low-density gases (air) to denser media (water), reflecting the combined effects of conventional refractive index and the ϕ\phiϕ-field contribution.

• Dipole Interaction: Magnetic and spin-like phenomena are interpreted as manifestations of ordered ϕ\phiϕ-field structures with axion-like dipole coupling.

Testability and Constraint Protocol

The study establishes the experimental viability of KFT through two complementary consistency criteria:

• Shapiro Consistency: The theory reproduces the classical Shapiro time delay exactly when its parameters satisfy a specific nonlinear constraint, ensuring compatibility with established gravitational tests.

• Unique Observable Signature: KFT predicts a novel, non-geometric effect — the Precession of Polarization (ΔΩ\Delta\OmegaΔΩ) for light propagating through gravitational or high-field regions — a measurable deviation absent in GR.

To guarantee physical realism, a Bayesian constraint protocol is developed using cross-disciplinary inputs from high-energy physics, particularly the Delbrück scattering likelihood (LDelbru¨ckL_{\mathrm{Delbrück}}LDelbru¨ck). This framework restricts the key coupling parameters (ε,Z0′,G0′)(\varepsilon, Z'_0, G'_0)(ε,Z0′,G0′) to experimentally plausible ranges, preserving theoretical self-consistency while enabling direct experimental tests.

Additionally, KFT assumes that the observable fraction of physical space is nearly empty: the currently detectable matter density is only ~0.01%, implying that 99.99% of the Khandro medium is effectively a vacuum. This low-density background ensures that the scalar field is long-range and weakly perturbed in most laboratory or astrophysical settings, while still allowing strong-field effects near compact objects (neutron stars, magnetars) or high-intensity electromagnetic setups.

Summary

Ultimately, this work provides the theoretical and methodological foundation for a complete, unified Khandro Field Theory, linking gravitation, electromagnetism, and inertial mass through a single scalar field framework, while highlighting the importance of medium-dependent light propagation and the largely empty, low-density nature of the observable universe in the field’s dynamics.

Preliminary illustrative explanations in video form:
👉 https://www.youtube.com/@Khandro-Theory
Extended discussions and detailed explanations are available on:
👉 https://www.patreon.com/TheForbiddenTheory

Related Works / Part of the Unified Khandro Field Theory (TOE/KFT) Project:
This publication is part of the broader Unified Khandro Field Theory (TOE/KFT) initiative. For full context and access to related studies, see:

1. [https://zenodo.org/records/17306876](https://zenodo.org/records/17306876)
   KFT Khandro Interferometric Tomography: Photon–Field Interaction and Applications to Tissue Imaging

2. [https://zenodo.org/records/17279181](https://zenodo.org/records/17279181)
   The Khandro Field Theory (KFT): Consistency Conditions from Shapiro Delay and Constraints from Delbrück Analogues

3. [https://zenodo.org/records/16911066](https://zenodo.org/records/16911066)
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4. [https://zenodo.org/records/17154443](https://zenodo.org/records/17154443)
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5. [https://zenodo.org/records/16951014](https://zenodo.org/records/16951014)
   Khandro Field Theory (TPK): Foundations of Gravity and the Origin of Inertial Mass

6. [https://zenodo.org/records/16886992](https://zenodo.org/records/16886992)
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