论文标题
尺寸-8 SMEFT匹配条件的低能量有效场理论
Dimension-8 SMEFT Matching Conditions for the Low-Energy Effective Field Theory
论文作者
论文摘要
在粒子物理学中，现代观点是根据有效的领域理论（EFT）对事物进行分类。在弱尺度之上，我们的SMEFT是在集成重的新物理（NP）时形成的，并且标准模型（SM）是领先部分。低于$ m_w $，我们有左（低能EFT），当重型SM粒子（$ W^\ pm $，$ z^0 $，$ h $，$ t $）被集成时形成。为了确定低能测量值取决于基础NP，有必要将左操作员的匹配条件计算到SMEFT操作员。这些匹配条件已经为所有左载操作员制定了尺寸6的SMEFT操作员，直至一环级别的Dimension 6。但是，对于所有低能观测物来说，这还不够。在本文中，我们介绍了所有此类左操作员的动量无关的匹配条件，以至于在树级上达到尺寸8。
In particle physics, the modern view is to categorize things in terms of effective field theories (EFTs). Above the weak scale, we have the SMEFT, formed when the heavy new physics (NP) is integrated out, and for which the Standard Model (SM) is the leading part. Below $M_W$, we have the LEFT (low-energy EFT), formed when the heavy SM particles ($W^\pm$, $Z^0$, $H$, $t$) are also integrated out. In order to determine how low-energy measurements depend on the underlying NP, it is necessary to compute the matching conditions of LEFT operators to SMEFT operators. These matching conditions have been worked out for all LEFT operators up to dimension 6 in terms of SMEFT operators up to dimension 6 at the one-loop level. However, this is not sufficient for all low-energy observables. In this paper we present the momentum-independent matching conditions of all such LEFT operators to SMEFT operators up to dimension 8 at tree level.
