Next-to-the-Leading-Order Hadronic Corrections for Standard Model and Beyond

TL;DR

This paper calculates next-to-the-leading-order hadronic corrections for electron-proton scattering asymmetries, comparing theoretical predictions with experimental data, and discusses potential sources of discrepancies including proton strangeness and new physics.

Contribution

It extends computational tools to include one-loop hadronic corrections for scattering asymmetries, providing improved theoretical predictions relevant to ongoing experiments.

Findings

No significant difference between monopole and dipole form factors in asymmetry calculations.

Theoretical results agree with G0 collaboration predictions.

Discrepancies with experimental data suggest contributions from proton strangeness or new physics.

Abstract

We explore various extensions of computational packages such as Feynarts and FormCalc in application to calculation of the electron-proton scattering asymmetries relevant to the G0 and QWeak experiments. Our calculations where completed up to the Next-to-the-Leading-Order (one-loop) using the dipole form factor in hadronic vertices. We saw no significant difference between monopole and dipole type of asymmetry over the range of Q^2 = 0.1 - 1.0 GeV^2. Our results are in the good agreement with theoretical predictions by the G0 collaboration, but show discrepancy from the experiment. This discrepancy from the experimental results is due to the strange content of the proton and possibly new physics as well.