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.
For the minimally coupling case, the constraints on free parameters are summa- rized in Tab
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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.