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Related Experiment Videos

Two-loop corrections to Bhabha scattering.

Alexander A Penin1

  • 1Institut für Theoretische Teilchenphysik, Universität Karlsruhe, 76128 Karlsruhe, Germany and Institute for Nuclear Research, Russian Academy of Sciences, 117312 Moscow, Russia.

Physical Review Letters
|August 11, 2005
PubMed
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We calculated two-loop radiative photonic corrections for Bhabha scattering. The results provide an infrared-finite differential cross section for precise luminosity determination at electron-positron colliders.

Area of Science:

  • High-energy physics
  • Quantum electrodynamics

Background:

  • Bhabha scattering is a fundamental process in electron-positron collisions.
  • Precise luminosity measurements are crucial for particle physics experiments.

Purpose of the Study:

  • To compute two-loop radiative photonic corrections to Bhabha scattering.
  • To obtain an infrared-finite differential cross section for luminosity determination.

Main Methods:

  • Leading-order small electron mass expansion.
  • Inclusion of soft photon bremsstrahlung.

Main Results:

  • Calculation of two-loop radiative photonic corrections up to the nonlogarithmic term.
  • Obtained an infrared-finite differential cross section.

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Conclusions:

  • The computed cross section is directly applicable to luminosity determination.
  • This work enhances precision measurements at current and future e+e- colliders.