# Results on Multiple Coulomb Scattering from 12 and 20 GeV electrons on Carbon targets

## TL;DR

This study measures multiple Coulomb scattering of 12 and 20 GeV electrons on carbon targets, comparing experimental data with GEANT4 simulations, revealing high agreement in core scattering angles but some discrepancies in the tails.

## Contribution

It provides detailed experimental data on electron scattering at high energies and evaluates the accuracy of GEANT4 simulations for these interactions.

## Key findings

- Excellent agreement between data and simulation in core scattering angles.
- Residual discrepancies observed in the tails of the scattering distribution.
- Results help improve modeling of high-energy electron interactions with matter.

## Abstract

Multiple scattering effects of 12 and 20 GeV electrons on 8 and 20 mm thickness carbon targets have been studied with high-resolution silicon microstrip detectors of the UA9 apparatus at the H8 line at CERN. Comparison of the scattering angle between data and GEANT4 simulation shows excellent agreement in the core of the distributions leaving some residual disagreement in the tails.