#CMSPaper 1231: It is commonly accepted that the #StandardModel is an effective theory, meaning it stops working at high energy. This #measurement uses #topquarks to test a pragmatic extension to the standard model, called standard model effective field theory (#SMEFT) assuming that more complex interactions are possible and each will change the behavior of existing particles like top quarks. And those changes can be checked (which is what this paper does)

https://arxiv.org/abs/2307.15761