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Precision Measurement of Trident Production in Strong Electromagnetic Fields

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We demonstrate experimentally that the trident process e-→e-e+e- in a strong external field, with a spatial extension comparable to the effective radiation length, is well understood theoretically. The experiment, conducted at CERN, probes values for the strong field parameter χ up to 2.4. Experimental data and theoretical expectations using the local constant field approximation show remarkable agreement over almost 3 orders of magnitude in yield.

TidsskriftPhysical Review Letters
StatusUdgivet - feb. 2023

Bibliografisk note

Funding Information:
We would like to thank Erik Larsen and Frank Daugaard for their enthusiasm and superb technical assistance during the experimental run. The numerical results presented in this work were partly obtained at the Centre for Scientific Computing Aarhus (CSCAA) and with support from Nvidia’s GPU grant program. This work was partially supported by the U.S. National Science Foundation (Grants No. PHY-1535696 and No. PHY-2012549) and from the Danish National Instrument Center for CERN Experiments (NICE).

Publisher Copyright:
© 2023 authors. Published by the American Physical Society.

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