The Resonant Effect of an Annihilation Channel in the Interaction of the Ultrarelativistic Electron and Positron in the Field of an X-ray Pulsar
| Autor: | D. V. Doroshenko, Victor V. Dubov, Sergei P. Roshchupkin |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
electron
Physics lcsh:QC793-793.5 Annihilation Bhabha scattering Field (physics) X-ray field Astrophysics::High Energy Astrophysical Phenomena lcsh:Elementary particle physics General Physics and Astronomy Electron Threshold energy 01 natural sciences Resonance (particle physics) Nuclear physics Positron Pulsar 0103 physical sciences positron Physics::Accelerator Physics High Energy Physics::Experiment Oleinik resonances 010306 general physics 010303 astronomy & astrophysics |
| Zdroj: | Universe, Vol 6, Iss 137, p 137 (2020) |
| ISSN: | 2218-1997 |
| DOI: | 10.3390/universe6090137 |
| Popis: | We investigated the effects that occur during the circulation of ultrarelativistic electrons and positrons in the field of an X-ray pulsar. A resonant process in annihilation and the subsequent production of the electron–positron pairs were studied theoretically. Under the resonance, the second-order process in an original fine-structure constant process effectively decays to two first order processes of the fine-structure constant: single-photon annihilation of the electron–positron pair stimulated by the external field, and the Breit–Wheeler process (single-photon birth of the electron–positron pair) stimulated by the external field. We show that resonance has a threshold energy for a certain combinational energy of the initial electron and positron. Furthermore, there is a definite small angle between initial ultrarelativistic particles’ momenta, in which resonance takes place. Initial and final electron–positron pairs fly in a narrow cone. We noticed that electron (positron) emission angle defines the energy of the final pair. We show that the resonant cross-section in the field of the X-ray pulsar may significantly exceed the corresponding cross-section without the field (Bhabha cross-section). |
| Databáze: | OpenAIRE |
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