Coupled SUGRA quintessence is preferred by current data at >4σ over the uncoupled case, with sign-changing interaction producing phantom-crossing behavior statistically similar to the CPL parametrization.
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Exponential quintessence model is fitted to BAO, cosmic chronometers, and DES-SN5YR/Pantheon+ data, yielding parameter bounds and diagnostics statistically comparable to LCDM.
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Coupled quintessence with a potential from supergravity exhibits sign-changing interaction
Coupled SUGRA quintessence is preferred by current data at >4σ over the uncoupled case, with sign-changing interaction producing phantom-crossing behavior statistically similar to the CPL parametrization.
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Cosmological Dynamics of Exponential Quintessence Constrained by BAO, Cosmic Chronometers, and DES-SN5YR/Pantheon+ Data
Exponential quintessence model is fitted to BAO, cosmic chronometers, and DES-SN5YR/Pantheon+ data, yielding parameter bounds and diagnostics statistically comparable to LCDM.