What question did this study set out to answer?

This research aims to evaluate the viability of radion oscillations in CCEGA using the Goldberger-Wise mechanism.

May 26, 2026Open Access

P64: Radion Oscillations and GW Emission in CCEGA — A Negative Result

Key Points

This research aims to evaluate the viability of radion oscillations in CCEGA using the Goldberger-Wise mechanism.
Computed radion mass using the Goldberger-Wise mechanism.
Analyzed the conditions for radion oscillations in the context of CCEGA.
Identified potential exceptions for fine-tuning scenarios near critical density.
Radion mass calculated to be approximately 10⁵ eV, well above LIGO/ET detection ranges.
Oscillations require extreme fine-tuning (ε ~ 10⁻³⁸), lacking theoretical support.
Identified a potential scenario near critical density that may allow oscillations in the kHz range.

Abstract

We compute the natural radion mass in CCEGA from the Goldberger-Wise mechanism: m_φ ~ 10⁵ eV (f_φ ~ 10¹⁹ Hz), far above the LIGO/ET band. ET-band radion oscillations require ε ~ 10⁻³⁸, extreme fine-tuning with no theoretical motivation. We conclude that radion oscillations are not a natural CCEGA prediction. A physically motivated exception is identified: near ρc, the radion-condensate coupling (P62) may suppress m_φ, potentially bringing oscillations into the kHz range. This remains an open calculation requiring the DBI radion-baryon coupling constant.

P64: Radion Oscillations and GW Emission in CCEGA — A Negative Result

Key Points

Abstract

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