f（R，R_{μν} R^{μν}，\Box R）引力理论中的牛顿常数和来自BBN的约束
Newton's constant in f(R,R_{μν}R^{μν},\Box R) theories of gravity and constraints from BBN
摘要：
我们考虑修正的Einstein-Hilbert作用，其中包含高阶和非局部的条款。我们推导出一个有效的牛顿引力常量适用于弱场极限，并使用原始核合成（BBN）的约束和本地引力约束$G_{eff}$，以测试我们的一般拉格朗日的几种情况下的可行性。我们还将提供一个BBN约束的$\Box R$重力校正。
英文摘要：
We consider corrections to the Einstein-Hilbert action which contain both higher order and nonlocal terms. We derive an effective Newtonian gravitational constant applicable at the weak field limit and use the primordial nucleosynthesis (BBN) bound and the local gravity constraints on $G_{eff}$ in order to test the viability of several cases of our general Lagrangian. We will also provide a BBN constrain on the $\Box R$ gravitational correction.
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