# New ISR Cross Section Results on $e^+e^- \to \pi^+\pi^-\pi^0\pi^0$ and $e^+e^- \to \pi^+\pi^-\eta$ from BaBar

## TL;DR

This paper reports new measurements of specific hadronic cross sections from BaBar and evaluates their impact on the muon's anomalous magnetic moment, enhancing precision in fundamental physics calculations.

## Contribution

It provides the first detailed measurements of the $e^+e^- o ext{hadrons}$ cross sections for these channels and assesses their contribution to muon g-2.

## Key findings

- Measured cross sections for $e^+e^- o ext{hadrons}$ channels.
- Calculated contributions to muon anomalous magnetic moment.
- Improved inputs for precision tests of the Standard Model.

## Abstract

Two new hadronic cross sections measured by the BaBar experiment are presented: $e^+e^- \to \pi^+\pi^-\pi^0\pi^0$ and $e^+e^- \to \pi^+\pi^-\eta$. For both channels, the contribution the anomalous magnetic moment of the muon is calculated.