论文标题
本地$ h_0 $是否与深色能源EFT矛盾？
Is Local $H_0$ At Odds With Dark Energy EFT?
论文作者
论文摘要
本地$ H_0 $确定当前属于$ H_0 \ sim 70 $ km/s/mpc（TRGB）和$ H_0 \ SIM 76 $ km/s/mpc（Tully-Fisher）之间的窗口。相比之下，在早期$λ$ CDM Universe中校准的BAO数据与Planck-$λ$ CDM，$ H_0 \ SIM 67.5 $ km/s/s/mpc在很大程度上是一致的。使用一个通用的两个进化状态方程（eos）的通用参数家族（de）$ w _ {\ textrm {de}}}（z）$和模拟的bao数据，我们证明，如果i）$ w _ {\ textrm {de}}}}（de}}}}（z = 0）<-1 $ $ and de de $ cdm bact $ cdm bact $ cdm cdm cdm bact yment $ cdm，违反这些条件的EO充其量会导致适度的$ H_0 $增加在$1σ$之内。说明的是，典型和k词都不满足条件，而耦合的精髓只能满足ii）。除了这些开创性的DE有效领域理论（EFT）之外，我们还将转向明确的例子。在Redshift $ Z $的扩展中，工作模型不可知，我们表明Brans-Dicke/$ f（R）$和Horndeski类中的动力学重力编织模型可能会导致$ H_0 $的边际和适度增加。我们确认，就增加$ H_0 $而言，没有DE EFT模型可以胜过DE模型的现象学两个参数家族。显然，晚期的宇宙可能不再足够容纳EFT所描述的$ H_0 $，BAO和DE。
Local $H_0$ determinations currently fall in a window between $H_0 \sim 70$ km/s/Mpc (TRGB) and $H_0 \sim 76$ km/s/Mpc (Tully-Fisher). In contrast, BAO data calibrated in an early $Λ$CDM universe are largely consistent with Planck-$Λ$CDM, $H_0 \sim 67.5$ km/s/Mpc. Employing a generic two parameter family of evolving equations of state (EoS) for dark energy (DE) $w_{\textrm{DE}}(z)$ and mock BAO data, we demonstrate that if i) $w_{\textrm{DE}}(z=0) < -1$ and ii) integrated DE density less than $Λ$CDM, then $H_0$ increases. EoS that violate these conditions at best lead to modest $H_0$ increases within $1 σ$. Tellingly, Quintessence and K-essence satisfy neither condition, whereas coupled Quintessence can only satisfy ii). Beyond these seminal DE Effective Field Theories (EFTs), we turn to explicit examples. Working model agnostically in an expansion in powers of redshift $z$, we show that Brans-Dicke/$f(R)$ and Kinetic Gravity Braiding models within the Horndeski class can lead to marginal and modest increases in $H_0$, respectively. We confirm that as far as increasing $H_0$ is concerned, no DE EFT model can outperform the phenomenological two parameter family of the DE models. Evidently, the late universe may no longer be large enough to accommodate $H_0$, BAO and DE described by EFT.
