论文标题
正规化4 $ D $ EINSTEIN-GAUSS BONNET重力的理论和观察性约束
Theoretical and observational constraints on regularized 4$D$ Einstein-Gauss-Bonnet gravity
论文作者
论文摘要
在四个维度上的重力理论是正则化的爱因斯坦 - 加斯 - 邦纳特（EGB）是一种新的尝试，以包括高斯 - 骨网术语的非平凡贡献。在本文中，我们从最近的宇宙学观察和一些理论约束也对理论模型参数的可能约束进行了详细分析。我们的结果表明，通过$ W_ {de} $的当前观察值以及GW170817和GRB 170817A的观察结果，以消失的裸露宇宙常数为$λ_0$。相反，对于不变的裸宇宙常数，我们的结果表明，当前对GW170817和GRB 170817A衡量的GW速度的观察将对$ \tildeα$构成约束，该理论的无尺寸参数，作为$ -7.78 3.33 \ times10^{ - 15} $。
Regularized Einstein-Gauss-Bonnet (EGB) theory of gravity in four dimensions is a new attempt to include nontrivial contributions of Gauss-Bonnet term. In this paper, we make a detailed analysis on possible constraints of the model parameters of the theory from recent cosmological observations, and some theoretical constraints as well. Our results show that the theory with vanishing bare cosmological constant, $Λ_0$, is ruled out by the current observational value of $w_{de}$, and the observations of GW170817 and GRB 170817A as well. For nonvanishing bare cosmological constant, instead, our results show that the current observation of the speed of GWs measured by GW170817 and GRB 170817A would place a constraints on $\tildeα$, a dimensionless parameter of the theory, as $-7.78\times10^{-16}\le \tildeα \leq 3.33\times10^{-15}$.
