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Description
I discuss in this talk the risk of absorbing, and thus missing, signs of heavy new physics at hadron colliders within the Parton Distribution Functions (PDFs). I start by presenting some background context on the PDFs which describe the subnuclear structure of the proton and the Standard Model Effective Field Theory (SMEFT) which allows for a model agnostic description of heavy new physics effects, while motivating why the two risk being mixed up in global fits.
I then present a realistic pseudodata risk-assessment for the High-Luminosity LHC in which signs of a heavy W’ boson is completely absorbed within the PDFs which highlights the unwanted consequences this would have. I propose two solutions to this problem, which have proved successful. First, bridging a “blind spot” in the dataset by adding projection measurements from future low-energy large-x DIS experiment, such as the Electron Ion Colliders at Brookhaven and the Forward Physics Facility at CERN. Second, removing the bias toward the Standard Model by fitting simultaneously PDFs and SMEFT using our publicly released software, SIMUnet. I conclude by reviewing the current status and limitations of our methodology and the directions for future improvements we are exploring.
