Advertisement

NLO QED corrections to ISR in \(e^+ e^-\) annihilation and the measurement of \(\sigma(e^+ e^- \rightarrow{\mathrm{hadrons}})\) using tagged photons

  • G. Rodrigo
  • A. Gehrmann-De Ridder
  • M. Guilleaume
  • J.H. Kühn
Theoretical physics

Abstract.

The leptonic tensor for the process \(e^+ e^- \rightarrow \gamma+\gamma^*\), which describes the next-to-leading order virtual and soft QED corrections to initial state radiation in \(e^+ e^-\) annihilation with emission of an extra virtual photon decaying into hadrons, is calculated. A Monte Carlo generator for the reaction \(e^+ e^- \rightarrow \gamma + \pi^+ \pi^-\) has been set up which includes these corrections. It thus describes configurations where the invariant mass of the hadrons plus photon is very close to \(s^{1/2}\). Predictions for cms energies of 1 to 10 GeV, corresponding to the energies of DAPHNE and B-meson factories, are presented. The possibility for an accurate measurement using tagged photons of \(\sigma(e^+ e^- \rightarrow{\mathrm {hadrons}})\), which plays an important role in the theoretical description of the muon anomalous magnetic moment and the running of the electromagnetic coupling, is discussed.

Keywords

Invariant Mass State Radiation Theoretical Description Virtual Photon Anomalous Magnetic Moment 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag Berlin Heidelberg / Società Italiana di Fisica 2001

Authors and Affiliations

  • G. Rodrigo
    • 1
  • A. Gehrmann-De Ridder
    • 1
  • M. Guilleaume
    • 1
  • J.H. Kühn
    • 1
  1. 1.Institut für Theoretische Teilchenphysik, Universität Karlsruhe, 76128 Karlsruhe, Germany DE

Personalised recommendations