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Linear Breit-Wheeler process driven by compact lasers.

L Q Han1, J Cai2, Y R Shou3

  • 1Hunan Provincial Key Laboratory of High-Energy Scale Physics and Applications, School of Physics and Electronics, Hunan University, Changsha, 410082, China.

Physical Review. E
|December 20, 2023
PubMed
Summary
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Researchers propose observing the two-photon Breit-Wheeler process using compact lasers and plasma. This method generates high-brilliance X-ray pulses and electron-positron pairs, enabling new physics studies.

Area of Science:

  • Plasma Physics
  • High-Energy Physics
  • Quantum Electrodynamics

Background:

  • The Breit-Wheeler process is a fundamental quantum electrodynamics (QED) interaction.
  • Observing this process typically requires high-energy colliders.
  • Compact laser systems offer a potential alternative for studying such phenomena.

Purpose of the Study:

  • To propose a novel method for observing the two-photon Breit-Wheeler process.
  • To demonstrate the feasibility of generating high-brilliance X-ray pulses and electron-positron pairs using compact lasers and plasma.
  • To enable the study of fundamental QED in a more accessible experimental setup.

Main Methods:

  • Utilizing laser plasma wakefield acceleration to generate a high-charge electron bunch.

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  • Simulating the scattering of this electron bunch with an opposing laser pulse in a subcritical density plasma.
  • Employing three-dimensional particle-in-cell (PIC) simulations to model the interactions and emissions.

    • Main Results:

    • Production of high-brilliance X-ray pulses (photon number > 3×10^11, brilliance > 1.6×10^23 photons/s/mm²/mrad²/0.1%BW at 1 MeV).
    • Generation of over 1.1×10^5 electron-positron pairs per shot via X-ray photon collisions.
    • Demonstration of transverse acceleration of positrons for safe detection.

    Conclusions:

    • The proposed method allows for the observation of the linear Breit-Wheeler process.
    • Compact laser-driven plasma provides a viable platform for fundamental QED research.
    • This approach facilitates single-shot experiments with enhanced safety features for particle detection.