May 5 – 10, 2019
Europe/Berlin timezone

Creation of Electron-Positron Pairs in Photon-Photon Collisions Driven by 10-PW Laser Pulses

May 7, 2019, 2:40 PM
Main Hall (MedILS)

Main Hall



Dr Jinqing Yu (Peking univeristy)


A novel approach is proposed to demonstrate the two-photon Breit-Wheeler process by using collimated and wide-bandwidth γ-ray pulses driven by 10-PW lasers. Theoretical calculations suggest that more than 3.2×10^8 electron-positron pairs with a divergence angle of 7° can be created per shot, and the signal-to-noise ratio is higher than 10^3. The positron signal, which is roughly 100 times higher than the detection limit, can be measured by using the existing spectrometers. This approach, which could demonstrate the e−e+ pair creation process from two photons, would provide important tests for two-photon physics and other fundamental physical theories.

Working group Secondary radiation generation & applications

Primary author

Dr Jinqing Yu (Peking univeristy)

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