Putting SMEFT Fits to Work

Understand

The Standard Model Effective Field Theory (SMEFT) provides a consistent framework for comparing precision measurements at the LHC to the Standard Model.

• The observation of statistically significant non-zero SMEFT coefficients would correspond to physics beyond the Standard Model (BSM) of some sort.
• A more difficult question to answer is what, if any, detailed information about the nature of the underlying high scale model can be obtained from these measurements.
• In this work, we consider the patterns of SMEFT operators present in five example models and discuss the assumptions inherent in using global fits to make BSM conclusions.