Production of high energy particles in laser and Coulomb fields and e^+e^- antenna

Details Production of high energy particles in laser and Coulomb fields and e^+e^- antenna Production of high energy particles in laser and Coulomb fields and e^+e^- antenna

2007-06-21

arxiv.org/abs/0706.3103v1

Phys.Rev.Lett.99:130404,2007

Physics

Atomic Physics

4 pages

Scientific paper

10.1103/PhysRevLett.99.130404

A strong laser field and the Coulomb field of a nucleus can produce e^{+}e^{-} pairs. It is shown for the first time that there is a large probability that electrons and positrons created in this process collide after one or several oscillations of the laser field. These collisions can take place at high energy resulting in several phenomena. The quasielastic collision e^{+}e^{-} -> e^{+}e^{-} allows acceleration of leptons in the laser field to higher energies. The inelastic collisions allow production of high energy photons e^{+}e^{-}-> 2 gamma and muons, e^{+}e^{-} -> mu^{+}mu^{-}. The yield of high-energy photons and muons produced via this mechanism exceeds exponentially their production through conventional direct creation in laser and Coulomb fields. A relation of the phenomena considered with the antenna-mechanism of multiphoton absorption in atoms is discussed.

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