New Physics Search with Precision Experiments: Theory Input

TL;DR

This paper discusses how ultra-precision low-energy experiments like MOLLER can detect new physics beyond the Standard Model by analyzing potential effects of particles such as dark Z'-bosons at the one-loop level.

Contribution

It provides a theoretical analysis of how new physics particles, specifically dark Z'-bosons, could influence high-precision measurements like the MOLLER experiment.

Findings

Dark Z'-bosons can significantly affect the measured asymmetry.

Next-to-leading order effects are crucial for interpreting precision experiments.

Potential signals of new physics can be identified through deviations from Standard Model predictions.

Abstract

The best way to search for new physics is by using a diverse set of probes - not just experiments at the energy and the cosmic frontiers, but also the low-energy measurements relying on high precision and high luminosity. One example of such ultra-precision experiments is the MOLLER experiment planned at JLab, which will measure the parity-violating electron-electron scattering asymmetry and allow a determination of the weak mixing angle with a factor of five improvement in precision over its predecessor, E-158. At this precision, any inconsistency with the Standard Model should signal new physics. The paper will explore how new physics particles enter at the next-to-leading order one-loop level. For MOLLER we analyze the effects of dark Z'-boson on the total calculated asymmetry, and show how this new physics interaction carriers may influence the analysis of the future experimental results.