Pair annihilation in laser pulses: optical vs. XFEL regimes

Details Pair annihilation in laser pulses: optical vs. XFEL regimes Pair annihilation in laser pulses: optical vs. XFEL regimes

2011-05-17

arxiv.org/abs/1105.3475v2

Phys.Rev.A84:032119,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

V2: 5 pages, 4 figures. Published version. Disucssion of optical case extended

Scientific paper

10.1103/PhysRevA.84.032119

We discuss the theory and phenomenology of pair annihilation, within an ultra-short laser pulse, to a single photon. The signature of this process is the uni-directional emission of single photons with a fixed energy. We show that the cross section is significantly larger than for two-photon pair annihilation in vacuum, with XFEL parameters admitting a much clearer signal than optical beams.

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