PrecisionSM: an annotated database for low-energy $e^+e^-$ hadronic cross sections

TL;DR

PrecisionSM is a curated database compiling low-energy $e^+e^-$ hadronic cross section data, aiding precise Standard Model tests via muon magnetic moment evaluations.

Contribution

It introduces a comprehensive, accessible database of $e^+e^-$ hadronic cross sections, integrated into the RMCL2 activities for improved scattering process modeling.

Findings

Contains data on dominant $2 o ext{pi}$ channels

Includes $3 o ext{pi}$ and $ ext{pi}^0 ext{gamma}$ channels

Supports data-driven $a_{}$ evaluations.

Abstract

PrecisionSM is an annotated database that compiles the available data on low-energy cross sections of electron-positron collisions into hadronic channels. This database organizes and collects data samples from $e^+e^-$ experiments, which are used as input for the data-driven theoretical evaluation of the muon anomalous magnetic moment, $a_{\mu}$, serving as a precise test of the Standard Model when compared to the experimental measurements of $a_{\mu}$. The database is accessible through a custom website (https://precision-sm.github.io) which contains details about the data samples, such as the treatment of radiative corrections, as well as links to papers on INSPIRE-HEP and to tables on HEPData. The PrecisionSM database was developed within a Joint Research Initiative in the group application of the European hadron physics community, STRONG2020, and is now incorporated into the RadioMonteCarLow2 Working Group (RMCL2 WG) activities, which have the more general goal of improving the theoretical description of scattering processes at $e^+e^-$ colliders. The results of Phase I of the new RMCL2 WG have been published in Aliberti et al, arXiv:hep-ph/2410.22882. In this proceeding, we will report on the status of the PrecisionSM database, which currently contains a list of the dominant $2\pi$ channel as well as $3\pi$ and $\pi^0\gamma$, and on the ongoing work for the other channels and for responsive plots.