Report of the Frontier For Rare Processes and Precision Measurements

TL;DR

The report summarizes the efforts and opportunities in the Rare and Precision Frontier, focusing on detecting rare processes and tiny deviations from the Standard Model to uncover new physics through high-precision experiments.

Contribution

It provides a comprehensive overview of research opportunities, experimental strategies, and the potential to constrain new physics interactions via rare process searches and precision measurements.

Findings

Identification of key research opportunities in rare processes.

Potential to constrain new physics scales and couplings.

Importance of precision measurements in probing fundamental symmetries.

Abstract

This is the Snowmass 2021 Rare and Precision Frontier Report. The Rare Processes and Precision Measurements Frontier, referred to as the ``Rare and Precision Frontier", or RPF, encompasses searches for extremely rare processes or tiny deviations from the Standard Model (SM) that can be studied with intense sources and high-precision detectors. Our community studies have identified several unique research opportunities that may pin down the scales associated with New Physics (NP) interactions and constrain the couplings of possible new degrees of freedom. Searches for rare flavor transition processes and precision measurements are indispensable probes of flavor and fundamental symmetries, and provide insights into physics that manifests itself at higher energy or through weaker interactions than those directly accessible at high-energy colliders.