EFT diagrammatica: UV roots of the CP-conserving SMEFT

A bstract The Standard Model Effective Field Theory (SMEFT) is an established theoretical framework that parametrises the impact a UV theory has on low-energy observables. Such parametrization achieved by studying interactions of SM fields encapsulated within higher mass dimensional ( ≥ 5) operators. Through judicious employment tools EFTs, SMEFT become source new predictions as well platform for conducting coherent comparison physics (beyond Model) scenarios. We, first time, are proposing diagrammatic approach to establish selection criteria allowed heavy field representations corresponding each operator. We have elucidated links chain connecting specific CP conserving dimension-6 operators with unique sets representations. contact representing effective operator been unfolded into tree- and (or) one-loop-level diagrams reveal embeddings them. For case, renormalizable vertices model serve building blocks all possible diagrams. Based this, we laid groundwork construct observable-driven models. This in turn also prevents us from making redundant analyses similar While taken predominantly minimalistic approach, highlighted necessity non-minimal certain