We found general solutions of matter stress-energy (non-)conservation in scalar-tensor FLRW-type cosmological models by extending the logotropic formalism to the case of non-minimal coupling between the scalar field and new dark fluid candidates. The energy conditions expressed by the generating function are introduced. Next, we investigate the possibility of separating baryonic from dark matter and explain their ratio as a chameleon effect in the presence of non-minimal coupling. To answer the question affirmatively we analyze simple extensions of Λ-CDM model by adding a non-minimally coupled scalar field in the Einstein frame. Two scenarios involving either a scalaron (quintessence) or a phantom (ghost) are numerically solved and compared. As a result, it is shown that in both cases LCDM model can be reproduced with a high accuracy in the region covered by observations. We have also demonstrated the compatibility of the two models under consideration with available PPN parameters estimations. As expected, in the case of the phantom (ghost) field the Big-Bang scenario is replaced by the (matter) Bounce.

中文翻译：

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是否有可能在 Λ-CDM 形式中将重子与暗物质分开？


通过将向标量形式扩展到标量场和新的暗流体候选者之间的非最小耦合情况，我们在标量张量 FLRW 型宇宙学模型中找到了物质应力-能量（非）守恒的一般解。介绍了生成函数表示的能量条件。接下来，我们研究了将重子与暗物质分离的可能性，并解释了它们在非最小耦合存在下的变色龙效应的比率。为了肯定地回答这个问题，我们通过在 Einstein 框架中添加非最小耦合标量场来分析 Λ-CDM 模型的简单扩展。对涉及标量 （quintessence） 或幻象 （ghost） 的两种情况进行数值求解和比较。结果表明，在这两种情况下，LCDM 模型都可以在观测覆盖的区域内以高精度再现。我们还证明了所考虑的两种模型与可用的 PPN 参数估计的兼容性。正如预期的那样，在 phantom （ghost） 场的情况下，Big-Bang 场景被 （matter） Bounce 取代。